Properties of the Number 66191

Sixty-Six Thousand One Hundred Ninety-One

Basics

Value: 66190 → 66191 → 66192

Parity: odd

Prime: Yes

Previous Prime: 66179

Next Prime: 66221

Digit Sum: 23

Digital Root: 5

Palindrome: No

Factorization: 66191

Divisors: 1, 66191

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 10000001010001111

Octal: 201217

Duodecimal: 3237B

Hexadecimal: 1028f

Square: 4381248481

Square Root: 257.2761162642191

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

Let N(p,i) denote the result of applying "nextprime" i times to p; a(n) = smallest prime p such that N(p,3) - p = 2·n, or -1 if no such prime exists. A339943

Let N(p,i) denote the result of applying "nextprime" i times to p; a(n) = smallest prime p such that N(p,4) - p = 2·n, or -1 if no such prime exists. A339944

Lesser of two consecutive primes such that n·p + q is a perfect square, p < q. A64545

Primes p=prime(i) of level (1,4), i.e., such that A118534(i) = prime(i-4). A216177

a(n) is the least prime p such that, if q is the next prime after p and d = q-p, then p-n·d, p+n·d, q-n·d and q+n·d are all prime. A353697

Primes such that the next 10 prime gaps are all distinct. A372550

5 consecutive primes differ by 2n or more starting at a(n). A54699

Numbers k such that the sum of the odd aliquot parts of k divides k. A66191