Properties of the Number 66561

Sixty-Six Thousand Five Hundred Sixty-One

Basics

Value: 66560 → 66561 → 66562

Parity: odd

Prime: No

Previous Prime: 66553

Next Prime: 66569

Digit Sum: 24

Digital Root: 6

Palindrome: No

Factorization: 3 × 11 × 2017

Divisors: 1, 3, 11, 33, 2017, 6051, 22187, 66561

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10000010000000001

Octal: 202001

Duodecimal: 32629

Hexadecimal: 10401

Square: 4430366721

Square Root: 257.9941859810023

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 that are the sum of 6 nonzero 8th powers. A3384

Main diagonal of number array A082105. A82106

Maximum number of rational points on a smooth absolutely irreducible projective curve of genus 2 over the field F₂ⁿ. A169873

Bitmaps of king + rook vs. king checkmate patterns on a standard 8 X 8 board. A362950

a(n) = 16·a(n-1) + a(n-2), starting with a(0) = 2 and a(1) = 16. A90305

a(n) is the smallest triangular number divisible by n. A66561