66326579675 has 6 divisors (see below), whose sum is σ = 82244958828. Its totient is φ = 53061263720.

The previous prime is 66326579639. The next prime is 66326579689. The reversal of 66326579675 is 57697562366.

It is a happy number.

It is not a de Polignac number, because 66326579675 - 2²⁴ = 66309802459 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1326531569 + ... + 1326531618.

It is an arithmetic number, because the mean of its divisors is an integer number (13707493138).

Almost surely, 2^66326579675 is an apocalyptic number.

66326579675 is a deficient number, since it is larger than the sum of its proper divisors (15918379153).

66326579675 is a wasteful number, since it uses less digits than its factorization.

66326579675 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2653063197 (or 2653063192 counting only the distinct ones).

The product of its digits is 85730400, while the sum is 62.

The spelling of 66326579675 in words is "sixty-six billion, three hundred twenty-six million, five hundred seventy-nine thousand, six hundred seventy-five".