Properties of the Number 66980

Sixty-Six Thousand Nine Hundred Eighty

Basics

Value: 66979 → 66980 → 66981

Parity: even

Prime: No

Previous Prime: 66977

Next Prime: 67003

Digit Sum: 29

Digital Root: 2

Palindrome: No

Factorization: 2 ² × 5 × 17 × 197

Divisors: 1, 2, 4, 5, 10, 17, 20, 34, 68, 85

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 10000010110100100

Octal: 202644

Duodecimal: 32918

Hexadecimal: 105a4

Square: 4486320400

Square Root: 258.80494585691366

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

Sum of the second largest parts of the partitions of n into 10 parts. A326597

Expansion of exp( ∑_n>=1 -sigma₂(2·n)*xⁿ/n ) in powers of x. A283242

Divide the positive integers into subsets of lengths given by successive primes. a(n) is the sum of primes contained in the n-th subset. A344718

Sum of two consecutive primes that is also sum of two consecutive even positive squares. A236461

Numbers k such that antid(k) > antid(k+1) and santid(k) > santid(k+1), where antid(k) = A066272 and santid(k) = A066417. A66980