Properties of the Number 66620

Sixty-Six Thousand Six Hundred Twenty

Basics

Value: 66619 → 66620 → 66621

Parity: even

Prime: No

Previous Prime: 66617

Next Prime: 66629

Digit Sum: 20

Digital Root: 2

Palindrome: No

Factorization: 2 ² × 5 × 3331

Divisors: 1, 2, 4, 5, 10, 20, 3331, 6662, 13324, 16655

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10000010000111100

Octal: 202074

Duodecimal: 32678

Hexadecimal: 1043c

Square: 4438224400

Square Root: 258.10850431553007

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

Rectangular array: (row n) = b**c, where b(h) = h³, c(h) = (n-1+h)³, n>=1, h>=1, and ** = convolution. A213558

G.f. A(x) satisfies: A(x) = 1/(1 + x·A(x) + x²*A(x)/(1 + x³*A(x) + x⁴*A(x)/(1 + x⁵*A(x) + x⁶*A(x)/(1 + ...)))), a continued fraction. A301410

Number of unordered triples of distinct pairwise coprime divisors of n. A66620