Properties of the Number 66865

Sixty-Six Thousand Eight Hundred Sixty-Five

Basics

Value: 66864 → 66865 → 66866

Parity: odd

Prime: No

Previous Prime: 66863

Next Prime: 66877

Digit Sum: 31

Digital Root: 4

Palindrome: No

Factorization: 5 × 43 × 311

Divisors: 1, 5, 43, 215, 311, 1555, 13373, 66865

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10000010100110001

Octal: 202461

Duodecimal: 32841

Hexadecimal: 10531

Square: 4470928225

Square Root: 258.58267536708644

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 binary strings of length n with no substrings equal to 0001 or 0010. A164392

Number of 5-cycles in the n-polygon diagonal intersection graph. A300553

Number of solutions to rev(x²) = rev(x)² with at most n digits, where the function rev(x) reverses the digits of x. A225301

Number of (n+1)X(n+1) -9..9 symmetric matrices with every 2X2 subblock having sum zero and one, two or three distinct values. A211553

Number of binary arrangements without adjacent 1's on n X n staggered hexagonal torus bent for odd n. A66865