Properties of the Number 66812

Sixty-Six Thousand Eight Hundred Twelve

Basics

Value: 66811 → 66812 → 66813

Parity: even

Prime: No

Previous Prime: 66809

Next Prime: 66821

Digit Sum: 23

Digital Root: 5

Palindrome: No

Factorization: 2 ² × 16703

Divisors: 1, 2, 4, 16703, 33406, 66812

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10000010011111100

Octal: 202374

Duodecimal: 327B8

Hexadecimal: 104fc

Square: 4463843344

Square Root: 258.4801733208952

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

Molien series for real extraspecial group 2^1+2·3 of degree 8 and order 128 formed from tensor products of Pauli matrices (0,1, 1,0) and (1,0, 0,-1). A14095

n times n+9 gives the concatenation of two numbers m and m+8. A116347

Number of (not necessarily maximal) cliques in the n-polygon diagonal intersection graph. A300524

Positive numbers whose square starts and ends with exactly 44, and no 444. A348831

Numbers k such that φ(k+1) = φ(k-1). A66812

Numbers k such that k concatenated with k+8 gives the product of two numbers which differ by 9. A116216

Number of length n+2 0..10 arrays with no consecutive three elements summing to more than 10. A241616