Properties of the Number 11666

Eleven Thousand Six Hundred Sixty-Six

Basics

Value: 11665 → 11666 → 11667

Parity: even

Prime: No

Previous Prime: 11657

Next Prime: 11677

Digit Sum: 20

Digital Root: 2

Palindrome: No

Factorization: 2 × 19 × 307

Divisors: 1, 2, 19, 38, 307, 614, 5833, 11666

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 10110110010010

Octal: 26622

Duodecimal: 6902

Hexadecimal: 2d92

Square: 136095556

Square Root: 108.00925886237717

Classification

Fibonacci: No

Bell Number: No

Factorial Number: No

Regular Number: No

Perfect Number: No

Special

Kaprekar Constant: No

Munchausen Constant: No

Armstrong Number: No

Kaprekar Number: No

Catalan Number: No

Vampire Number: No

Taxicab Number: No

Super Prime: No

Friedman Number: No

Fermat Number: No

Cullen Number: No

OEIS Sequences

Coordination sequence for C₃ lattice: a(n) = 16·n² + 2 (n>0), a(0)=1. A10006

Beastly (or hateful) numbers: numbers containing the string 666 in their decimal expansion. A51003

a(n) = n*(8·n+3). A139276

Numbers using only digits 1 and 6. A284293

G.f.: A(x) = ∑_n>=0 xⁿ / ∏_k=1..n (1 - k·x^k). A193196

Number of subsets of {1..n} containing n such that every subset has a different sum. A325866

Number of (i,j,k) in {1,2,...,n}³ such that gcd(n,i) = gcd(n,j) = gcd(n,k). A338997

First terms "a" of quadruples a>b>c>d>0 with six square pairwise sums. A175534

a(0) = 1, a(n) = 9·n² + 2 for n>0. A10002

Numbers of apex graphs (graphs which become or remain planar upon the removal of a single vertex) on n vertices. A215620