Properties of the Number 16666

Sixteen Thousand Six Hundred Sixty-Six

Basics

Value: 16665 → 16666 → 16667

Parity: even

Prime: No

Previous Prime: 16661

Next Prime: 16673

Digit Sum: 25

Digital Root: 7

Palindrome: No

Factorization: 2 × 13 × 641

Divisors: 1, 2, 13, 26, 641, 1282, 8333, 16666

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 100000100011010

Octal: 40432

Duodecimal: 978A

Hexadecimal: 411a

Square: 277755556

Square Root: 129.0968628588627

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 which are divisible by prime(d) for all digits d in their decimal representation. A256786

Beastly (or hateful) numbers: numbers containing the string 666 in their decimal expansion. A51003

a(n) = (5·10ⁿ - 2)/3. A246057

Numbers k such that 2^k == 10 (mod k). A128123

Number of partitions of n having population standard deviation < 2. A238658

Number of numbers removed in each step of Eratosthenes's sieve for 10⁵. A145538

Fourth powers (n·n * n·n) in carryless arithmetic mod 10. A169886

a(n) = floor(10⁵/n). A33427

Number of partitions of n having standard deviation σ <= 2. A238659

Number of maximal cubefree binary words of length n. A282133