Properties of the Number 66245

Sixty-Six Thousand Two Hundred Forty-Five

Basics

Value: 66244 → 66245 → 66246

Parity: odd

Prime: No

Previous Prime: 66239

Next Prime: 66271

Digit Sum: 23

Digital Root: 5

Palindrome: No

Factorization: 5 × 13249

Divisors: 1, 5, 13249, 66245

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 10000001011000101

Octal: 201305

Duodecimal: 32405

Hexadecimal: 102c5

Square: 4388400025

Square Root: 257.381040482783

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

Twice partitioned numbers where the first partition is constant and the latter partitions are strict. A279788

Numbers k such that k³ - b2 is a triangular number (A000217), where b2 is the largest square less than k³. A233401

Number of ways to reciprocally link elements of an n X 5 array either to themselves or to exactly two horizontal and vertical neighbors, without consecutive collinear links. A220611

T(n,k)=Number of ways to reciprocally link elements of an nXk array either to themselves or to exactly two horizontal and vertical neighbors, without consecutive collinear links. A220614

Floor(|x·sin(x)|)-perfect numbers, where f-perfect numbers for an arithmetical function f are defined in A066218. A66245