Properties of the Number 66961

Sixty-Six Thousand Nine Hundred Sixty-One

Basics

Value: 66960 → 66961 → 66962

Parity: odd

Prime: No

Previous Prime: 66959

Next Prime: 66973

Digit Sum: 28

Digital Root: 1

Palindrome: No

Factorization: 29 × 2309

Divisors: 1, 29, 2309, 66961

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 10000010110010001

Octal: 202621

Duodecimal: 32901

Hexadecimal: 10591

Square: 4483775521

Square Root: 258.7682360723588

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

a(n) is the upper end of a record gap A349995(n) between consecutive odd squarefree semiprimes (A046388). A350099

Numerator of ∑_{p prime, p-1 divides 2·n} 1/p. A27761

Denominator of Bernoulli_n multiplied by the sum of the associated inverse primes in the Staudt-Clausen theorem, n=1, 2, 4, 6, 8, 10,... A166306

Numbers k such that σ(k) divides σ(σ(k)). A66961