766
domain: N
Properties
Digital Properties
- Digit Count
- 3
- Digit Sum
- 19
- Digital Root
- 1
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 3
Divisibility
- Divisor Count
- 4
- Divisor Sum
- 1152
- Proper Divisor Sum (Aliquot Sum)
- 386
- 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
- 382
- Möbius Function
- 1
- Radical
- 766
- Omega Function (Ω)
- 2
- Little Omega Function (ω)
- 2
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
- 46
- Smith Number
- no
Primality
- Prime
- no
- Composite Number
- yes
- Semiprime
- yes
- 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
Names
- German
- siebenhundertsechsundsechzig· ordinal: siebenhundertsechsundsechzigste
- English
- seven hundred sixty-six· ordinal: seven hundred sixty-sixth
- Spanish
- setecientos sesenta y seis· ordinal: 766º
- French
- sept cent soixante-six· ordinal: sept cent soixante-sixième
- Italian
- settecentosessantasei· ordinal: 766º
- Latin
- septingenti sexaginta sex· ordinal: 766.
- Portuguese
- setecentos e sessenta e seis· ordinal: 766º
Appears in sequences
- Number of binary necklaces of length n with no subsequence 00, excluding the necklace "0".at n=19A000358
- Number of series-reduced planted trees with n leaves. Also the number of essentially series series-parallel networks with n edges; also the number of essentially parallel series-parallel networks with n edges.at n=8A000669
- Number of trimmed trees with n nodes.at n=15A002988
- Beginnings of periodic unitary aliquot sequences.at n=64A003062
- Numbers that are the sum of 9 positive 5th powers.at n=28A003354
- Convolution of A002024 with itself.at n=30A004797
- Representation degeneracies for boson strings.at n=29A005290
- Centered pentagonal numbers: (5n^2+5n+2)/2; crystal ball sequence for 3.3.3.4.4. planar net.at n=17A005891
- a(n) = floor(tau*a(n-1)) + floor(tau*a(n-2)) with a(0)=1 and a(1)=3.at n=8A005913
- Number of ways to quarter an n X n chessboard, with the central square removed for odd n.at n=7A006067
- Number of subwords of length n in infinite word generated by a -> aab, b -> b.at n=42A006697
- a(n) is the number of unlabeled modular lattices on n nodes.at n=12A006981
- A grasshopper sequence: closed under n -> 2n+2 and 6n+6.at n=47A007319
- Coordination sequence T1 for Zeolite Code ABW and ATN.at n=19A008000
- Coordination sequence T2 for Zeolite Code AFR.at n=21A008020
- Coordination sequence T2 for Zeolite Code EAB and OFF.at n=20A008083
- Coordination sequence T4 for Zeolite Code FER.at n=17A008109
- Coordination sequence T4 for Zeolite Code MEI.at n=20A008149
- Coordination sequence T3 for Zeolite Code MFS.at n=17A008175
- Coordination sequence T4 for Zeolite Code MTT.at n=17A008192