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Properties of the Number 13066

Thirteen Thousand Sixty-Six

Basics

Value: 13065 → 13066 → 13067

Parity: even

Prime: No

Previous Prime: 13063

Next Prime: 13093

Digit Sum: 16

Digital Root: 7

Palindrome: No

Factorization: 2 × 47 × 139

Divisors: 1, 2, 47, 94, 139, 278, 6533, 13066

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 11001100001010

Octal: 31412

Duodecimal: 768A

Hexadecimal: 330a

Square: 170720356

Square Root: 114.30660523346846

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

Numbers n such that sopfr(n) = sopfr(n-1) + sopfr(n-2), where sopfr is the sum of prime factors of n with multiplicity (A001414). A294995
A Wallis pair (x,y) satisfies σ(x2) = σ(y2); sequence gives x's for indecomposable Wallis pairs with x < y (ordered by values of x). A75768
a(n) is the number of 5 element sets of distinct integer-sided trapezoids whose base angles are 60 degrees that fill an equilateral triangular grid of side n units with a trapezoid filled by 3 trapezoids. A391204
Number of digits in n-th even perfect number (A000396). A61193
a(n) = 6·binomial(n,4) + 3·binomial(n,3) + 4·binomial(n,2) - n + 2. A66375
Upper bound on number of regular triangulations of cyclic polytope C(n, n-4). A66456
Numbers n such that (n + prime(n)), (n+1 + prime(n+1)), (n+2 + prime(n+2)) and (n+3 + prime(n+3)) are divisible by 5. A107582
Fixed points of the permutation A087559. A131221
Averages of four consecutive cubes. A173965
Number of 3 X 3 X 3 triangular 0..n arrays with every horizontal row nondecreasing, first elements of rows nonincreasing, last elements of rows nondecreasing, and every row having the same average value. A215183