Properties of the Number 80666

Eighty Thousand Six Hundred Sixty-Six

Basics

Value: 80665 → 80666 → 80667

Parity: even

Prime: No

Previous Prime: 80657

Next Prime: 80669

Digit Sum: 26

Digital Root: 8

Palindrome: No

Factorization: 2 × 53 × 761

Divisors: 1, 2, 53, 106, 761, 1522, 40333, 80666

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 10011101100011010

Octal: 235432

Duodecimal: 3A822

Hexadecimal: 13b1a

Square: 6507003556

Square Root: 284.0176050881353

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) = (2·n-1)*(13·n²-13·n+6)/6. A63493

Number of permutations avoiding the patterns {2431, 3421, 4231, 4321, 24513, 42513, 34512, 43512}; number of strong sorting class based on 2431. A111285

Expansion of ∑_n>=1 q^n*(n-1) / (1-q)ⁿ. A321481

Numbers k such that k² + 1 and k² - 1 are not squarefree. A80666