Properties of the Number 6638

Six Thousand Six Hundred Thirty-Eight

Basics

Value: 6637 → 6638 → 6639

Parity: even

Prime: No

Previous Prime: 6637

Next Prime: 6653

Digit Sum: 23

Digital Root: 5

Palindrome: No

Factorization: 2 × 3319

Divisors: 1, 2, 3319, 6638

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 1100111101110

Octal: 14756

Duodecimal: 3A12

Hexadecimal: 19ee

Square: 44063044

Square Root: 81.47392220827471

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

Minimal exponents m such that the fractional part of (11/10)^m obtains a minimum (when starting with m=1). A153685

Numbers k such that the fractional part of (11/10)^k is less than 1/k. A153686

Sum of the largest parts of the partitions of n into 10 squarefree parts. A326637

Semiprimes that are the sum of the first n semiprimes for some n. A92190

Trajectory of n under the Reverse and Add! operation carried out in base 3 (presumably) does not reach a palindrome and (presumably) does not join the trajectory of any term m < n. A77405

T(n,k)=Number of nXk 0..1 arrays with every element equal to 1, 2, 3, 4 or 5 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero. A300930

Expansion of 1/(2 - ∏_k>=1 (1 + x^2·k-1)). A307058

Expansion of 1/(2 - ∏_k>=1 1/(1 + x^k)). A307060

a(n) = coefficient of xⁿ*yⁿ in ∏_n>=1 (1 - (xⁿ + yⁿ)). A322213

Diagonal sums of number triangle A046521. A176280