Properties of the Number 66850

Sixty-Six Thousand Eight Hundred Fifty

Basics

Value: 66849 → 66850 → 66851

Parity: even

Prime: No

Previous Prime: 66841

Next Prime: 66851

Digit Sum: 25

Digital Root: 7

Palindrome: No

Factorization: 2 × 5 ² × 7 × 191

Divisors: 1, 2, 5, 7, 10, 14, 25, 35, 50, 70

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10000010100100010

Octal: 202442

Duodecimal: 3282A

Hexadecimal: 10522

Square: 4468922500

Square Root: 258.5536694769579

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 symmetric 4 X 4 matrices of nonnegative integers with every row and column adding to n. A53493

Second elementary symmetric function of 3,4,...,n+3. A24183

Number of n X 3 0..1 arrays avoiding 0 0 0 and 0 1 1 horizontally and 0 0 1 and 1 1 0 vertically. A207106

Numbers n such that φ(φ(n)) + σ(σ(n)) = φ(σ(n)) + σ(φ(n)), where φ=A000010 is Euler's totient function and σ=A000203 is the sum of divisors function. A66850