668755975 has 6 divisors (see below), whose sum is σ = 829257440. Its totient is φ = 535004760.

The previous prime is 668755957. The next prime is 668755987. The reversal of 668755975 is 579557866.

668755975 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 668755975 - 2⁹ = 668755463 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 13375095 + ... + 13375144.

Almost surely, 2^668755975 is an apocalyptic number.

668755975 is a deficient number, since it is larger than the sum of its proper divisors (160501465).

668755975 is a wasteful number, since it uses less digits than its factorization.

668755975 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26750249 (or 26750244 counting only the distinct ones).

The product of its digits is 15876000, while the sum is 58.

The square root of 668755975 is about 25860.3166067239. The cubic root of 668755975 is about 874.4921025247.

The spelling of 668755975 in words is "six hundred sixty-eight million, seven hundred fifty-five thousand, nine hundred seventy-five".