6466
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 22
- Digital Root
- 4
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 4
Divisibility
- Divisor Count
- 8
- Divisor Sum
- 10044
- Proper Divisor Sum (Aliquot Sum)
- 3578
- Abundant Number
- no
- Perfect Number
- no
- Deficient Number
- yes
- Highly Composite
- no
- Weird Number
- no
- Untouchable Number
- no
- Primitive Abundant
- no
Derived Values
- Euler's Totient
- 3120
- Möbius Function
- -1
- Radical
- 6466
- Omega Function (Ω)
- 3
- 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
- 168
- Smith Number
- no
- Vampire Number
- no
Primality
- Prime
- no
- Composite Number
- yes
- Semiprime
- no
- Squarefree Number
- yes
- 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
- Number of board-pile polyominoes with n cells.at n=8A001169
- Markoff (or Markov) numbers: union of positive integers x, y, z satisfying x^2 + y^2 + z^2 = 3*x*y*z.at n=18A002559
- Numbers k such that the continued fraction for sqrt(k) has period 29.at n=14A020368
- Numbers n such that prime(n) mod n <= 10.at n=48A022465
- Numbers k such that prime(k) == 1 (mod k).at n=9A023143
- Markov numbers satisfying region 5 (x=5) of the equation x^2 + y^2 + z^2 = 3xyz.at n=7A030452
- Numbers k such that the continued fraction for sqrt(k) has odd period and if the last term of the periodic part is deleted then there are a pair of central terms both equal to 10.at n=8A031423
- Numbers having three 6's in base 10.at n=10A043515
- a(n) = a(1) + a(2) + ... + a(n-1) - a(m) for n >= 4, where m = 2^(p+1) + 2 - n and p is the unique integer such that 2^p < n - 1 <= 2^(p+1), starting with a(1) = a(2) = a(3) = 1.at n=15A049885
- Number of mobiles (circular rooted trees) with n nodes and 3 leaves.at n=21A055341
- a(n) = 2^n mod Fibonacci(n).at n=20A057862
- Number of partitions of n with nonnegative crank.at n=34A064428
- a(n) = 3^n mod n^3.at n=22A066607
- Numbers k such that the digits of the k-th prime begin with k.at n=5A067928
- Numbers n such that, as strings, n is a substring of prime(n).at n=6A068575
- Decimal concatenations of the quadruples (d1,d2,d3,d4) with elements in {2,4,6} for which there exists a prime p >= 5 such that the differences between the 5 consecutive primes starting with p are (d1,d2,d3,d4).at n=20A078868
- Numbers k that divide prime(k)+1 or prime(k)-1.at n=19A078931
- Number of solutions to x*frac[p(x)/x]<=Log[n] or A004648(n)<=Log[n].at n=24A099641
- Numbers k such that prime(k+1) == 3 (mod k).at n=9A105288
- Number of positive integers <= 10^n that are divisible by no prime exceeding 5.at n=15A106598