664774604 has 24 divisors (see below), whose sum is σ = 1259354880. Its totient is φ = 305224704.

The previous prime is 664774567. The next prime is 664774609. The reversal of 664774604 is 406477466.

It is not an unprimeable number, because it can be changed into a prime (664774609) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23084 + ... + 43155.

It is an arithmetic number, because the mean of its divisors is an integer number (52473120).

Almost surely, 2^664774604 is an apocalyptic number.

It is an amenable number.

664774604 is a deficient number, since it is larger than the sum of its proper divisors (594580276).

664774604 is a wasteful number, since it uses less digits than its factorization.

664774604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66449 (or 66447 counting only the distinct ones).

The product of its (nonzero) digits is 677376, while the sum is 44.

The square root of 664774604 is about 25783.2233050874. The cubic root of 664774604 is about 872.7532471765.

The spelling of 664774604 in words is "six hundred sixty-four million, seven hundred seventy-four thousand, six hundred four".