Properties of the Number 66645

Sixty-Six Thousand Six Hundred Forty-Five

Basics

Value: 66644 → 66645 → 66646

Parity: odd

Prime: No

Previous Prime: 66643

Next Prime: 66653

Digit Sum: 27

Digital Root: 9

Palindrome: No

Factorization: 3 ² × 5 × 1481

Divisors: 1, 3, 5, 9, 15, 45, 1481, 4443, 7405, 13329

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10000010001010101

Octal: 202125

Duodecimal: 32699

Hexadecimal: 10455

Square: 4441556025

Square Root: 258.15692901799093

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

Triangle read by rows: T(n,k) is the number of unoriented colorings of the facets of a regular n-dimensional orthotope using exactly k colors. Row n has 2n columns. A325009

2-ranks of difference sets constructed from Glynn type II hyperovals. A49114

Number of length 3+3 0..n arrays with every four consecutive terms having the sum of some three elements equal to three times the fourth. A248540

a(n) = floor( (4/3)*π*n³ ). A66645