664167384 has 32 divisors (see below), whose sum is σ = 1844910000. Its totient is φ = 221389056.

The previous prime is 664167347. The next prime is 664167391. The reversal of 664167384 is 483761466.

It is a happy number.

It is a super-2 number, since 2×664167384² = 882236627938806912, which contains 22 as substring.

It is a congruent number.

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, 1537209 + ... + 1537640.

Almost surely, 2^664167384 is an apocalyptic number.

It is an amenable number.

664167384 is an abundant number, since it is smaller than the sum of its proper divisors (1180742616).

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

664167384 is a wasteful number, since it uses less digits than its factorization.

664167384 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3074864 (or 3074854 counting only the distinct ones).

The product of its digits is 580608, while the sum is 45.

The square root of 664167384 is about 25771.4451282810. The cubic root of 664167384 is about 872.4874354449.

The spelling of 664167384 in words is "six hundred sixty-four million, one hundred sixty-seven thousand, three hundred eighty-four".