Properties of the Number 66668

Sixty-Six Thousand Six Hundred Sixty-Eight

Basics

Value: 66667 → 66668 → 66669

Parity: even

Prime: No

Previous Prime: 66653

Next Prime: 66683

Digit Sum: 32

Digital Root: 5

Palindrome: No

Factorization: 2 ² × 7 × 2381

Divisors: 1, 2, 4, 7, 14, 28, 2381, 4762, 9524, 16667

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 10000010001101100

Octal: 202154

Duodecimal: 326B8

Hexadecimal: 1046c

Square: 4444622224

Square Root: 258.20147172314876

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

Euler transform of A051064, the ruler function sequence for k=3. A173241

T(n,k)=Number of nXk 0..1 arrays with every element equal to 0, 2, 3, 4, 5 or 8 king-move adjacent elements, with upper left element zero. A299366

Numbers k such that k and k² use only the digits 0, 2, 4, 6 and 8. A136904

Numbers with digits 6 and 8 only. A284635

Number of Fibonacci numbers F(k), k <= 10ⁿ, which end in 8. A73555

Numbers k such that k² contains only digits {2,4,6}. A53922

a(n) = 2·a(n-1) - a(n-2) + a([n/2]), where a(0) = 1, a(1) = 1, a(2) = 1. A298414

Numbers k such that k and k² use only the digits 1, 2, 4, 6 and 8. A136994

Numbers k such that k and k² use only the digits 2, 3, 4, 6 and 8. A137072

Numbers k such that k and k² use only the digits 2, 4, 5, 6 and 8. A137095