664005064 has 16 divisors (see below), whose sum is σ = 1262545920. Its totient is φ = 327326160.

The previous prime is 664005037. The next prime is 664005077. The reversal of 664005064 is 460500466.

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, 583944 + ... + 585079.

It is an arithmetic number, because the mean of its divisors is an integer number (78909120).

Almost surely, 2^664005064 is an apocalyptic number.

It is an amenable number.

664005064 is a deficient number, since it is larger than the sum of its proper divisors (598540856).

664005064 is a wasteful number, since it uses less digits than its factorization.

664005064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1169100 (or 1169096 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 31.

The square root of 664005064 is about 25768.2957139195. The cubic root of 664005064 is about 872.4163521092.

The spelling of 664005064 in words is "six hundred sixty-four million, five thousand, sixty-four".