664705088 has 14 divisors (see below), whose sum is σ = 1319024286. Its totient is φ = 332352512.

The previous prime is 664705039. The next prime is 664705099. The reversal of 664705088 is 880507466.

It can be written as a sum of positive squares in only one way, i.e., 440664064 + 224041024 = 20992^2 + 14968^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5192945 + ... + 5193072.

Almost surely, 2^664705088 is an apocalyptic number.

It is an amenable number.

664705088 is a deficient number, since it is larger than the sum of its proper divisors (654319198).

664705088 is a wasteful number, since it uses less digits than its factorization.

664705088 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10386029 (or 10386019 counting only the distinct ones).

The product of its (nonzero) digits is 322560, while the sum is 44.

The square root of 664705088 is about 25781.8751839349. The cubic root of 664705088 is about 872.7228246196.

The spelling of 664705088 in words is "six hundred sixty-four million, seven hundred five thousand, eighty-eight".