Properties of the Number 66009

Sixty-Six Thousand Nine

Basics

Value: 66008 → 66009 → 66010

Parity: odd

Prime: No

Previous Prime: 65993

Next Prime: 66029

Digit Sum: 21

Digital Root: 3

Palindrome: No

Factorization: 3 × 22003

Divisors: 1, 3, 22003, 66009

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10000000111011001

Octal: 200731

Duodecimal: 32249

Hexadecimal: 101d9

Square: 4357188081

Square Root: 256.92216720244284

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) = 2ⁿ * n! * binomial(3·n/2,n) * ∑_k=1..n 1/(n+2·k). A384167

Covering numbers C(n,7,6). A66009