664351064 has 32 divisors (see below), whose sum is σ = 1342746720. Its totient is φ = 306333696.

The previous prime is 664351043. The next prime is 664351081. The reversal of 664351064 is 460153466.

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, 139832 + ... + 144504.

It is an arithmetic number, because the mean of its divisors is an integer number (41960835).

Almost surely, 2^664351064 is an apocalyptic number.

It is an amenable number.

664351064 is an abundant number, since it is smaller than the sum of its proper divisors (678395656).

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

664351064 is a wasteful number, since it uses less digits than its factorization.

664351064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6059 (or 6055 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 35.

The square root of 664351064 is about 25775.0085160025. The cubic root of 664351064 is about 872.5678588064.

The spelling of 664351064 in words is "six hundred sixty-four million, three hundred fifty-one thousand, sixty-four".