Properties of the Number 66800

Sixty-Six Thousand Eight Hundred

Basics

Value: 66799 → 66800 → 66801

Parity: even

Prime: No

Previous Prime: 66797

Next Prime: 66809

Digit Sum: 20

Digital Root: 2

Palindrome: No

Factorization: 2 ⁴ × 5 ² × 167

Divisors: 1, 2, 4, 5, 8, 10, 16, 20, 25, 40

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10000010011110000

Octal: 202360

Duodecimal: 327A8

Hexadecimal: 104f0

Square: 4462240000

Square Root: 258.4569596664017

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 0, 2, 4, 6 and 8. A136904

Number of length 5 0..n arrays least squares fitting to a zero slope straight line, with a single point taken as having zero slope. A245135

Number of (n+2)X(6+2) 0..3 arrays with every consecutive three elements in every row and column not having exactly two distinct values, and in every diagonal and antidiagonal having exactly two distinct values, and new values 0 upwards introduced in row major order. A253023

Numbers k that divide the (right) concatenation of all numbers <= k written in base 5 (most significant digit on left). A29450

Number of different eventual period lengths for power sequences mod n; i.e., number of different period lengths of repeating digits of 1/n in different bases. A66800

Numbers n such that 2ⁿ is not the average of three positive cubes. A274384