Properties of the Number 66825

Sixty-Six Thousand Eight Hundred Twenty-Five

Basics

Value: 66824 → 66825 → 66826

Parity: odd

Prime: No

Previous Prime: 66821

Next Prime: 66841

Digit Sum: 27

Digital Root: 9

Palindrome: No

Factorization: 3 ⁵ × 5 ² × 11

Divisors: 1, 3, 5, 9, 11, 15, 25, 27, 33, 45

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10000010100001001

Octal: 202411

Duodecimal: 32809

Hexadecimal: 10509

Square: 4465580625

Square Root: 258.5053190942113

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 2 positive 5th powers. A3347

a(n) = n⁵ * ∑_{p∣n, p prime} 1/p⁵. A351245

Numbers of form x⁵ + y⁵, x,y > 0 and x <> y. A88703

Denominators of coefficients c(n) in product expansion of (tan x)/x = ∏_k>=1 1 + c(k)*x^2k. A353587

Antidiagonal sums of square array A082011. A82014

Odd numbers divisible by exactly 8 primes (counted with multiplicity). A46321

Leading coefficients of numerators of Norlund's B_νⁿ polynomials (Nørlund, Tafel 5, p. 459). A290030

Discriminants of totally real cubic fields with 2 associated nonconjugate fields. A329786

Difference in count of primes <= mean and > mean below 10ⁿ in A092849 and A092850. A92851

Denominator of Laguerre(n, 8). A160639