Properties of the Number 6556

Six Thousand Five Hundred Fifty-Six

Basics

Value: 6555 → 6556 → 6557

Parity: even

Prime: No

Previous Prime: 6553

Next Prime: 6563

Digit Sum: 22

Digital Root: 4

Palindrome: Yes

Factorization: 2 ² × 11 × 149

Divisors: 1, 2, 4, 11, 22, 44, 149, 298, 596, 1639

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 1100110011100

Octal: 14634

Duodecimal: 3964

Hexadecimal: 199c

Square: 42981136

Square Root: 80.96912991998865

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

Number of partitions of a 2n-set into even blocks. A5046

Ruth-Aaron numbers (1): sum of prime divisors of n = sum of prime divisors of n+1. A6145

Generalized 28-gonal (or icosioctagonal) numbers: m*(13·m - 12) with m = 0, +1, -1, +2, -2, +3, -3, ... A303812

Numbers n such that Bernoulli number B_n has denominator 690. A272186

Expansion of e.g.f. LambertW(x/(-1+x))/x*(-1+x). A52868

Triangle Q, read by rows, such that Q³ transforms column k of Q² into column k+1 of Q², so that column k of Q² equals column 0 of Q^3·k+2, where Q³ denotes the matrix cube of Q. A113381

Palindromic in bases 10 and 20. A250408

Numbers which have only digits 5 and 6 in base 10. A256291

a(n) = (9·n² + 3·n + 2)/2. A38764

Triangular array T(n,k), read by rows: coefficients of strong divisibility sequence of polynomials p(1,x) = 1, p(2,x) = 2 + 3·x, p(n,x) = u·p(n-1,x) + v·p(n-2,x) for n >= 3, where u = p(2,x), v = 1 - 2·x - x². A367297