Properties of the Number 81663

Eighty-One Thousand Six Hundred Sixty-Three

Basics

Value: 81662 → 81663 → 81664

Parity: odd

Prime: No

Previous Prime: 81649

Next Prime: 81667

Digit Sum: 24

Digital Root: 6

Palindrome: No

Factorization: 3 × 163 × 167

Divisors: 1, 3, 163, 167, 489, 501, 27221, 81663

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10011111011111111

Octal: 237377

Duodecimal: 3B313

Hexadecimal: 13eff

Square: 6668845569

Square Root: 285.76738792241497

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

Number of labeled interval orders on n elements: (2+2)-free posets. A79144

Sums of the diagonals of the matrix formed by listing the h-Stohr sequences in increasing order. A193911

a(n) = Fibonacci(2n+1) + n·2^n-1. A81663

Number of length-(n+1) 0..6 arrays with new repeated values introduced in sequential order starting with zero. A268259