Properties of the Number 66969

Sixty-Six Thousand Nine Hundred Sixty-Nine

Basics

Value: 66968 → 66969 → 66970

Parity: odd

Prime: No

Previous Prime: 66959

Next Prime: 66973

Digit Sum: 36

Digital Root: 9

Palindrome: No

Factorization: 3 ² × 7 × 1063

Divisors: 1, 3, 7, 9, 21, 63, 1063, 3189, 7441, 9567

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10000010110011001

Octal: 202631

Duodecimal: 32909

Hexadecimal: 10599

Square: 4484846961

Square Root: 258.7836934584558

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 with digits 6 and 9 only. A284636

Numbers k such that k and k² use only the digits 1, 4, 6, 8 and 9. A137055

Expansion of 1/((1-2x)(1-3x)(1-8x)(1-11x)). A25950

Number of permutations of [n] avoiding {1324, 2341, 4123}. A294703

Numbers k such that ∑_i=1..k φ(i)/gcd(k,i) is an integer. A66969