666875788 has 24 divisors (see below), whose sum is σ = 1181056464. Its totient is φ = 329448000.

The previous prime is 666875773. The next prime is 666875801. The reversal of 666875788 is 887578666.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 178338 + ... + 182038.

It is an arithmetic number, because the mean of its divisors is an integer number (49210686).

Almost surely, 2^666875788 is an apocalyptic number.

It is an amenable number.

666875788 is a deficient number, since it is larger than the sum of its proper divisors (514180676).

666875788 is a wasteful number, since it uses less digits than its factorization.

666875788 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4233 (or 4231 counting only the distinct ones).

The product of its digits is 27095040, while the sum is 61.

The square root of 666875788 is about 25823.9382743996. The cubic root of 666875788 is about 873.6717973429.

The spelling of 666875788 in words is "six hundred sixty-six million, eight hundred seventy-five thousand, seven hundred eighty-eight".