664401174 has 36 divisors (see below), whose sum is σ = 1413849204. Its totient is φ = 208102848.

The previous prime is 664401169. The next prime is 664401181. The reversal of 664401174 is 471104466.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 1073037 + ... + 1073655.

It is an arithmetic number, because the mean of its divisors is an integer number (39273589).

Almost surely, 2^664401174 is an apocalyptic number.

664401174 is an abundant number, since it is smaller than the sum of its proper divisors (749448030).

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

664401174 is an equidigital number, since it uses as much as digits as its factorization.

664401174 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1277 (or 641 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 33.

The square root of 664401174 is about 25775.9805633074. The cubic root of 664401174 is about 872.5897966435.

The spelling of 664401174 in words is "six hundred sixty-four million, four hundred one thousand, one hundred seventy-four".