664680177 has 24 divisors (see below), whose sum is σ = 1099402304. Its totient is φ = 379072224.

The previous prime is 664680089. The next prime is 664680179. The reversal of 664680177 is 771086466.

It is not a de Polignac number, because 664680177 - 2¹⁴ = 664663793 is a prime.

It is not an unprimeable number, because it can be changed into a prime (664680179) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 22863 + ... + 43035.

Almost surely, 2^664680177 is an apocalyptic number.

It is an amenable number.

664680177 is a deficient number, since it is larger than the sum of its proper divisors (434722127).

664680177 is a wasteful number, since it uses less digits than its factorization.

664680177 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20709 (or 20706 counting only the distinct ones).

The product of its (nonzero) digits is 338688, while the sum is 45.

The square root of 664680177 is about 25781.3920686995. The cubic root of 664680177 is about 872.7119222057.

The spelling of 664680177 in words is "six hundred sixty-four million, six hundred eighty thousand, one hundred seventy-seven".