Properties of the Number 66591

Sixty-Six Thousand Five Hundred Ninety-One

Basics

Value: 66590 → 66591 → 66592

Parity: odd

Prime: No

Previous Prime: 66587

Next Prime: 66593

Digit Sum: 27

Digital Root: 9

Palindrome: No

Factorization: 3 ² × 7 ² × 151

Divisors: 1, 3, 7, 9, 21, 49, 63, 147, 151, 441

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10000010000011111

Octal: 202037

Duodecimal: 32653

Hexadecimal: 1041f

Square: 4434361281

Square Root: 258.0523202763347

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(2·n+1) = 9·a(n), a(2·n+2) = 10·a(n) + a(n-1). A116555

Number of (n+1) X 7 0..2 arrays with all 2 X 2 subblock sums the same. A184000

Number of (n+1) X 8 0..2 arrays with all 2 X 2 subblock sums the same. A184001

T(n,k)=Number of (n+1)X(k+1) 0..2 arrays with all 2X2 subblock sums the same. A184003

Primes which can be expressed as a concatenation of nonnegative squares. A66591