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Properties of the Number 66198

Sixty-Six Thousand One Hundred Ninety-Eight

Basics

Value: 66197 → 66198 → 66199

Parity: even

Prime: No

Previous Prime: 66191

Next Prime: 66221

Digit Sum: 30

Digital Root: 3

Palindrome: No

Factorization: 2 × 3 × 11 × 17 × 59

Divisors: 1, 2, 3, 6, 11, 17, 22, 33, 34, 51

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 10000001010010110

Octal: 201226

Duodecimal: 32386

Hexadecimal: 10296

Square: 4382175204

Square Root: 257.28971996564496

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

Giuga numbers: composite numbers n such that p divides n/p - 1 for every prime divisor p of n. A7850
Starts of runs of 3 consecutive Niven numbers in base 2 (A049445). A330932
24 'Reverse and Add' steps are needed to reach a palindrome. A65318
Consider the Diophantine equation x3 + y3 = z3 - 1 (x < y < z) or 'Fermat near misses'. The values of z (see A050787) are arranged in monotonically increasing order. Sequence gives values of y. A50789
Fourth right hand column of triangle A165674. A165676
1/4 the number of (n+1) X 9 binary arrays with all 2 X 2 subblock sums the same. A183985
Numbers m such that (m'-1)' = m+1, where m' denotes the arithmetic derivative of m. A203617
Number of (7+2) X (n+2) 0..1 arrays with every 3 X 3 subblock sum of the two sums of the diagonal and antidiagonal minus the two minimums of the central column and central row nondecreasing horizontally, vertically and ne-to-sw antidiagonally. A254913
Prime power Giuga numbers: composite numbers n > 1 such that -1/n + sum 1/pk = 1, where the sum is over the prime powers pk dividing n. A286497
Number of subsets of {1, 2, ..., n} such that the sum of the reciprocals is strictly less than 1. A305442