Properties of the Number 66749

Sixty-Six Thousand Seven Hundred Forty-Nine

Basics

Value: 66748 → 66749 → 66750

Parity: odd

Prime: Yes

Previous Prime: 66739

Next Prime: 66751

Digit Sum: 32

Digital Root: 5

Palindrome: No

Factorization: 66749

Divisors: 1, 66749

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 10000010010111101

Octal: 202275

Duodecimal: 32765

Hexadecimal: 104bd

Square: 4455429001

Square Root: 258.3582783655287

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

Primes that remain prime through 3 iterations of the function f(x) = 2·x + 1. A23272

Primes that remain prime through 4 iterations of function f(x) = 2x + 1. A23302

Initial (unsafe) primes of Cunningham chains of first type with length exactly 5. Primes in A059453 that survive as primes just four "2p+1 iterations", forming chains of exactly 5 terms. A59764

Smallest primes starting a complete four iterations Cunningham chain of the first or second kind. A110027

Euler transform of square powers of 2: [2,2⁴,2⁹,...,2^n²,...]. A158099

a(n) = 2 + floor((1 + ∑_j=1..n-1 a(j))/3). A120149

Prime(prime(n)) when prime(prime(n)) and n are twin primes. A87394

Primes of the form 10·k²+14·k+5, k >= 0. A154412

Primes which contain the fax number of the beast (667). A321001

List of primes p which are equal to a central binomial coefficient C(n,floor(n/2)) plus 1. A66749