Properties of the Number 6620

Six Thousand Six Hundred Twenty

Basics

Value: 6619 → 6620 → 6621

Parity: even

Prime: No

Previous Prime: 6619

Next Prime: 6637

Digit Sum: 14

Digital Root: 5

Palindrome: No

Factorization: 2 ² × 5 × 331

Divisors: 1, 2, 4, 5, 10, 20, 331, 662, 1324, 1655

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 1100111011100

Octal: 14734

Duodecimal: 39B8

Hexadecimal: 19dc

Square: 43824400

Square Root: 81.36338242723197

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

Partial sums of A299291. A299292

Numbers n such that Bernoulli number B_n has denominator 330. A272183

a(n) = floor(n*φ¹⁶), where φ is the golden ratio, A001622. A4931

Expansion of e.g.f. cos(log(1+x)). A3703

Real part of ∏_{k = 0..n} (1 + k·i), i = sqrt(-1). A105750

Number of polyominoes with n cells that tile the plane. A54359

Imaginary part of ∏_{k = 1..n} (k + i), i = sqrt(-1). A231531

T(n,k)=Number of nXk 0..1 arrays with no 1 equal to more than two of its horizontal, diagonal and antidiagonal neighbors, with the exception of exactly two elements. A283784

Numbers that have 9 terms in their Zeckendorf representation. A179249

T(n,k)=Equals one maps: number of nXk binary arrays indicating the locations of corresponding elements equal to exactly one of their horizontal, diagonal and antidiagonal neighbors in a random 0..1 nXk array. A220537