6620
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 14
- Digital Root
- 5
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 1
Divisibility
- Divisor Count
- 12
- Divisor Sum
- 13944
- Proper Divisor Sum (Aliquot Sum)
- 7324
- Abundant Number
- yes
- Perfect Number
- no
- Deficient Number
- no
- Highly Composite
- no
- Weird Number
- no
- Untouchable Number
- no
- Primitive Abundant
- no
Derived Values
- Euler's Totient
- 2640
- Möbius Function
- 0
- Radical
- 3310
- Omega Function (Ω)
- 4
- Little Omega Function (ω)
- 3
Special
- Factorial
- no
- Catalan Number
- no
- Bell Number
- no
- Motzkin Number
- no
- Primorial
- no
Figurate Numbers
- Fibonacci Number
- no
- Triangular Number
- no
- Perfect Square
- no
- Perfect Cube
- no
- Pentagonal Number
- no
- Hexagonal Number
- no
- Lucas Number
- no
- Tetrahedral Number
- no
- Pell Number
- no
- Tribonacci Number
- no
- Pronic Number
- no
Recreational
- Happy Number
- no
- Harshad Number
- no
- Narcissistic Number
- no
- Collatz Steps
- 44
- Smith Number
- no
- Vampire Number
- no
Primality
- Prime
- no
- Composite Number
- yes
- Semiprime
- no
- Squarefree Number
- no
- Prime Power
- no
- Prime Factorization
- no
- Twin Prime
- no
- Mersenne Prime
- no
- Sophie Germain Prime
- no
- Safe Prime
- no
- Powerful Number
- no
- Achilles Number
- no
- Perfect Power
- no
- Smooth Number
- no
- Carmichael Number
- no
Classification
- Even
- yes
- Odd
- no
Appears in sequences
- a(n) = floor(n*phi^16), where phi is the golden ratio, A001622.at n=3A004931
- Cycle class sequence c(n) (the number of true cycles of length n in which a certain node is included) for zeolite RTH = RUB-13 [B2Si30O64].2R starting with a T3 atom.at n=12A019228
- Number of 5-ary search trees on n keys.at n=13A019499
- [ exp(3/11)*n! ].at n=6A030945
- Starting from generation 6 add previous and next term yielding generation 7.at n=26A048453
- Number of polyominoes with n cells that tile the plane.at n=10A054359
- Average of 4 primes where the integer Schwarzian derivative is zero.at n=7A094903
- Triangle, read by rows, where the n-th diagonal equals the n-th row transformed by triangle A008459 (squared binomial coefficients).at n=61A097084
- Each term is previous term plus ceiling of geometric mean of all previous terms.at n=58A114830
- Sums of three consecutive heptagonal numbers.at n=29A129111
- Number of binary strings of length n with no substrings equal to 0010 0110 or 1011.at n=13A164497
- Numbers that have 9 terms in their Zeckendorf representation.at n=3A179249
- Triangle read by rows: number of set partitions of n elements with k circular connectors.at n=49A185983
- G.f.: A(x) = exp( Sum_{n>=1} 5*5^A112765(n) * x^n/n ), where A112765 is the exponent of the highest power of 5 dividing n.at n=14A195760
- Indices of maximal gaps between consecutive nontrivial zeros of the Riemann zeta function.at n=15A208436
- Triangle of numbers with n 1's and n 0's in their representation in base of Fibonacci numbers (A014417).at n=38A210619
- Number of (w,x,y,z) with all terms in {1,...,n} and |w-x|=2|x-y|+2|y-z|.at n=30A212576
- Equals one maps: number of nX4 binary arrays indicating the locations of corresponding elements equal to exactly one of their horizontal, diagonal and antidiagonal neighbors in a random 0..1 nX4 array.at n=3A220535
- T(n,k)=Equals one maps: number of nXk binary arrays indicating the locations of corresponding elements equal to exactly one of their horizontal, diagonal and antidiagonal neighbors in a random 0..1 nXk array.at n=24A220537
- Equals one maps: number of 4Xn binary arrays indicating the locations of corresponding elements equal to exactly one of their horizontal, diagonal and antidiagonal neighbors in a random 0..1 4Xn array.at n=3A220540