Properties of the Number 66675

Sixty-Six Thousand Six Hundred Seventy-Five

Basics

Value: 66674 → 66675 → 66676

Parity: odd

Prime: No

Previous Prime: 66653

Next Prime: 66683

Digit Sum: 30

Digital Root: 3

Palindrome: No

Factorization: 3 × 5 ² × 7 × 127

Divisors: 1, 3, 5, 7, 15, 21, 25, 35, 75, 105

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10000010001110011

Octal: 202163

Duodecimal: 32703

Hexadecimal: 10473

Square: 4445555625

Square Root: 258.2150266735071

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

Number of regions in regular n-gon with all diagonals drawn. A7678

4-dimensional analog of centered polygonal numbers. Also number of regions created by sides and diagonals of a convex n-gon in general position. A6522

Step cyclic shifted sequence structures using a maximum of five different symbols. A56432

Signed recurrence over enriched r-trees: a(n) = 2 * (-1)ⁿ + Sum_y ∏_{i in y} a(y) where the sum is over all integer partitions of n - 1. A301469

a(n) = A007678(2·n+1). A341735

Numbers k such that k and k² use only the digits 2, 4, 5, 6 and 7. A137094

Number of walks within N³ (the first octant of Z³) starting at (0,0,0) and consisting of n steps taken from {(-1, -1, 1), (-1, 1, -1), (1, -1, 0), (1, -1, 1), (1, 1, 1)}. A149570

a(n) = A066674(n)-1 divided by the n-th prime. A66675