Properties of the Number 66912

Sixty-Six Thousand Nine Hundred Twelve

Basics

Value: 66911 → 66912 → 66913

Parity: even

Prime: No

Previous Prime: 66889

Next Prime: 66919

Digit Sum: 24

Digital Root: 6

Palindrome: No

Factorization: 2 ⁵ × 3 × 17 × 41

Divisors: 1, 2, 3, 4, 6, 8, 12, 16, 17, 24

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 10000010101100000

Octal: 202540

Duodecimal: 32880

Hexadecimal: 10560

Square: 4477215744

Square Root: 258.67353942759587

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

Unitary superperfect numbers: numbers n such that usigma(usigma(n)) = 2·n, where usigma(n) is the sum of unitary divisors of n (A034448). A38843

Numbers n for which A324108(n) = A324054(n-1) and which are neither prime powers nor of the form 2ⁱ * p^j, where p is an odd prime, with either exponent i or j > 0. A324111

A strong divisibility sequence associated with the algebraic integer 2 + i. A230369

Numbers m such that A049417(A049417(m)) = k·m for some k where A049417 is the infinitary σ function. A318182

Expansion of e.g.f. sin(x)/cos(sin(x)) (odd powers only). A9553

Positive numbers whose square starts and ends with exactly 44, and no 444. A348831

Expansion of exp(x)/cosh(sinh(x)). A9296

Fourth column of the Eulerian triangle A008292 in square array format. A66912

Coordination sequence for D₁₁ lattice. A107506