666645175626 has 8 divisors (see below), whose sum is σ = 1333290351264. Its totient is φ = 222215058540.

The previous prime is 666645175579. The next prime is 666645175627. The reversal of 666645175626 is 626571546666.

666645175626 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

666645175626 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 666645175626.

It is not an unprimeable number, because it can be changed into a prime (666645175627) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55553764630 + ... + 55553764641.

It is an arithmetic number, because the mean of its divisors is an integer number (166661293908).

Almost surely, 2^666645175626 is an apocalyptic number.

666645175626 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

666645175626 is a wasteful number, since it uses less digits than its factorization.

666645175626 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111107529276.

The product of its digits is 65318400, while the sum is 60.

The spelling of 666645175626 in words is "six hundred sixty-six billion, six hundred forty-five million, one hundred seventy-five thousand, six hundred twenty-six".