Properties of the Number 66999

Sixty-Six Thousand Nine Hundred Ninety-Nine

Basics

Value: 66998 → 66999 → 67000

Parity: odd

Prime: No

Previous Prime: 66977

Next Prime: 67003

Digit Sum: 39

Digital Root: 3

Palindrome: No

Factorization: 3 × 23 × 971

Divisors: 1, 3, 23, 69, 971, 2913, 22333, 66999

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10000010110110111

Octal: 202667

Duodecimal: 32933

Hexadecimal: 105b7

Square: 4488866001

Square Root: 258.8416504351647

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 with digits 6 and 9 only. A284636

Expansion of ∏_k>=1 1/(1 + x^k)^k+1. A305628

Integers k, not divisible by any of their digits, such that ∑_{j = digits of k} k/j is an integer different from k. A393454

The first 10 digits of the cube root of n contain the digits 0-9. A119517

a(n) = 3ⁿ * ∑_i=1..n i³/3ⁱ. A66999