Properties of the Number 6666

Six Thousand Six Hundred Sixty-Six

Basics

Value: 6665 → 6666 → 6667

Parity: even

Prime: No

Previous Prime: 6661

Next Prime: 6673

Digit Sum: 24

Digital Root: 6

Palindrome: Yes

Factorization: 2 × 3 × 11 × 101

Divisors: 1, 2, 3, 6, 11, 22, 33, 66, 101, 202

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 1101000001010

Octal: 15012

Duodecimal: 3A36

Hexadecimal: 1a0a

Square: 44435556

Square Root: 81.64557550780079

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

Repdigit numbers, or numbers whose digits are all equal. A10785

Numbers k such that the k-th triangular number contains only digits {0,1,2}. A119034

a(n) = 6*(10ⁿ - 1)/9. A2280

Convolved Fibonacci numbers. A1628

Coordination sequence for (3,6,8) tiling of hyperbolic plane. A265077

Numbers which have only digits 5 and 6 in base 10. A256291

Numbers k such that 3^k - 28 is prime. A219047

Numbers whose set of base-10 digits is {0,6}. A204093

Numbers which have only digits 6 and 7 in base 10. A256292

Number of integer partitions of n with alternating product > 1. A347448