Properties of the Number 66725

Sixty-Six Thousand Seven Hundred Twenty-Five

Basics

Value: 66724 → 66725 → 66726

Parity: odd

Prime: No

Previous Prime: 66721

Next Prime: 66733

Digit Sum: 26

Digital Root: 8

Palindrome: No

Factorization: 5 ² × 17 × 157

Divisors: 1, 5, 17, 25, 85, 157, 425, 785, 2669, 3925

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 10000010010100101

Octal: 202245

Duodecimal: 32745

Hexadecimal: 104a5

Square: 4452225625

Square Root: 258.3118270617898

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 k such that k and k² use only the digits 2, 4, 5, 6 and 7. A137094

Consider the family of simple graphs. Sequence gives the triangle read by rows giving coefficients of polynomials arising from enumeration of those graphs on n edges. A98234

Primes whose product of digits + 1 is also prime. A66725