Properties of the Number 85666

Eighty-Five Thousand Six Hundred Sixty-Six

Basics

Value: 85665 → 85666 → 85667

Parity: even

Prime: No

Previous Prime: 85661

Next Prime: 85667

Digit Sum: 31

Digital Root: 4

Palindrome: No

Factorization: 2 × 7 × 29 × 211

Divisors: 1, 2, 7, 14, 29, 58, 203, 211, 406, 422

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10100111010100010

Octal: 247242

Duodecimal: 416AA

Hexadecimal: 14ea2

Square: 7338663556

Square Root: 292.687546711506

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 3, 5, 6, 7 and 8. A137132

Expansion of 2*(x+1)*(x⁴+6·x³+5·x²+6·x+1)/(x⁶-18·x³+1). A247035

Numbers k such that (10^k - 97)/3 is prime. A293757

Decimal expansion of -tan(tan(tan(1))). A85666