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Properties of the Number 6720

Six Thousand Seven Hundred Twenty

Basics

Value: 6719 → 6720 → 6721

Parity: even

Prime: No

Previous Prime: 6719

Next Prime: 6733

Digit Sum: 15

Digital Root: 6

Palindrome: No

Factorization: 2 6 × 3 × 5 × 7

Divisors: 1, 2, 3, 4, 5, 6, 7, 8, 10, 12

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2730 Try Today's Challenge

Representations

Binary: 1101001000000

Octal: 15100

Duodecimal: 3A80

Hexadecimal: 1a40

Square: 45158400

Square Root: 81.97560612767678

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

Expansion of Eisenstein series E4(q) (alternate convention E2(q)); θ series of E8 lattice. A4009
Triangle T(n,k) = n!/(n-k)! (0 <= k <= n) read by rows, giving number of permutations of n things k at a time. A8279
Triangle T(n,k) read by rows: multinomial coefficients for the partitions of n listed in Abramowitz-Stegun order, 1 <= k <= A000041(n). A36038
The minimal numbers: sequence A005179 arranged in increasing order. A7416
a(n) = n!/6. A1715
Triangle of permutation coefficients arranged with 1's on the diagonal. Also, triangle of permutations on n letters with exactly k+1 cycles and with the first k+1 letters in separate cycles. A94587
Numbers that are divisible by exactly 9 primes with multiplicity. A46312
First positive integer with each ω-sequence. A325238
Triangle read by rows: T(n, k) = n! / k!, 1 <= k <= n. A173333
Triangle of falling factorials, read by rows: T(n, k) = n*(n-1)*...*(n-k+1), n > 0, 1 <= k <= n. A68424