Properties of the Number 66501

Sixty-Six Thousand Five Hundred One

Basics

Value: 66500 → 66501 → 66502

Parity: odd

Prime: No

Previous Prime: 66499

Next Prime: 66509

Digit Sum: 18

Digital Root: 9

Palindrome: No

Factorization: 3 ⁴ × 821

Divisors: 1, 3, 9, 27, 81, 821, 2463, 7389, 22167, 66501

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10000001111000101

Octal: 201705

Duodecimal: 32599

Hexadecimal: 103c5

Square: 4422383001

Square Root: 257.87787807409927

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

a(n) = (2·n-1)*(n² -n +2)/2. A63488

From a problem concerning circulant matrices and Gauss sums. A7792

Number of nX2 1..3 arrays containing at least one of each value, all equal values connected, rows considered as a single number in nondecreasing order, and columns considered as a single number in nondecreasing order. A166796

Numbers k such that x⁶ == 1 (mod(k)) has no solution 1 < x < k-1. A66501