Properties of the Number 66665

Sixty-Six Thousand Six Hundred Sixty-Five

Basics

Value: 66664 → 66665 → 66666

Parity: odd

Prime: No

Previous Prime: 66653

Next Prime: 66683

Digit Sum: 29

Digital Root: 2

Palindrome: No

Factorization: 5 × 67 × 199

Divisors: 1, 5, 67, 199, 335, 995, 13333, 66665

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 10000010001101001

Octal: 202151

Duodecimal: 326B5

Hexadecimal: 10469

Square: 4444222225

Square Root: 258.19566224086725

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 compositions into sums of cubes. A23358

Numbers k such that k² contains only digits {2,4,5}. A31154

Numbers having four 6's in base 10. A43516

Numbers k such that k and k² use only the digits 2, 3, 4, 5 and 6. A137067

Numbers k such that k and k² use only the digits 2, 4, 5, 6 and 7. A137094

Numbers k such that k+2 divides concat(k, k+1). A281232

Numbers k such that k and k² use only the digits 1, 2, 4, 5 and 6. A136988

Numbers k such that k and k² use only the digits 2, 4, 5 and 6. A137093

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

Numbers k such that k and k² use only the digits 2, 4, 5, 6 and 9. A137096