Properties of the Number 64660

Sixty-Four Thousand Six Hundred Sixty

Basics

Value: 64659 → 64660 → 64661

Parity: even

Prime: No

Previous Prime: 64633

Next Prime: 64661

Digit Sum: 22

Digital Root: 4

Palindrome: No

Factorization: 2 ² × 5 × 53 × 61

Divisors: 1, 2, 4, 5, 10, 20, 53, 61, 106, 122

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 1111110010010100

Octal: 176224

Duodecimal: 31504

Hexadecimal: fc94

Square: 4180915600

Square Root: 254.2833065696606

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

Numbers k such that 2^k + 15 is prime. A57197

T(n,k)=Number of nXk 0..3 arrays with rows and columns unimodal. A223850

T(n,k) = Number of (n+1) X (k+1) 0..3 arrays with nondecreasing maximum of every two consecutive values in every row and column. A251120

10-level labeled rooted trees with n leaves. A81697

Expansion of (f(-x²) / φ(-x³))² in powers of·where φ(), f() are Ramanujan θ functions. A233034

Number of n-step mappings with 5 inputs. A5946

Consider the sequence {b(m)} of composite numbers (excluding 1); sequence gives values of b(m) where gcd(m, b(m)) increases. A58012

Even numbers of the form floor( binomial(2k, 2j)/binomial(k, j)). A111304

Number of nX3 0..3 arrays with rows and columns unimodal. A223845

Number of (n+1)X(2+1) 0..3 arrays with nondecreasing maximum of every two consecutive values in every row and column. A251115