Properties of the Number 66660

Sixty-Six Thousand Six Hundred Sixty

Basics

Value: 66659 → 66660 → 66661

Parity: even

Prime: No

Previous Prime: 66653

Next Prime: 66683

Digit Sum: 24

Digital Root: 6

Palindrome: No

Factorization: 2 ² × 3 × 5 × 11 × 101

Divisors: 1, 2, 3, 4, 5, 6, 10, 11, 12, 15

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 10000010001100100

Octal: 202144

Duodecimal: 326B0

Hexadecimal: 10464

Square: 4443555600

Square Root: 258.185979479909

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 whose set of base-10 digits is {0,6}. A204093

List the positions of all digits 6 in the concatenation of all terms, not necessarily in order. This is the lexicographically earliest such sequence. A210420

Sum of all digit permutations of the concatenation of first n numbers. A71268

a(1)=3; for n>1, a(n) is least number such that a(n) > a(n-1) and a(1)²+...+a(n)² is a square. A127689

Numbers having four 6's in base 10. A43516

Numbers k such that k and k² use only the digits 0, 3, 4, 5 and 6. A136927

Number of active (ON, black) cells at stage 2ⁿ-1 of the two-dimensional cellular automaton defined by "Rule 158", based on the 5-celled von Neumann neighborhood. A270334

Number of divisors of 2n excluding 1. A66660

Record values in A179066. A179105

Integer part of the arithmetic mean of all the distinct numbers formed by permuting the digits of concatenation of numbers from 1 to n. A78266