664405354 has 8 divisors (see below), whose sum is σ = 996725700. Its totient is φ = 332163456.

The previous prime is 664405349. The next prime is 664405363. The reversal of 664405354 is 453504466.

It can be written as a sum of positive squares in 2 ways, for example, as 656128225 + 8277129 = 25615^2 + 2877^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11322 + ... + 38170.

Almost surely, 2^664405354 is an apocalyptic number.

664405354 is a deficient number, since it is larger than the sum of its proper divisors (332320346).

664405354 is a wasteful number, since it uses less digits than its factorization.

664405354 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39224.

The product of its (nonzero) digits is 172800, while the sum is 37.

The square root of 664405354 is about 25776.0616464191. The cubic root of 664405354 is about 872.5916265709.

The spelling of 664405354 in words is "six hundred sixty-four million, four hundred five thousand, three hundred fifty-four".