664715024 has 10 divisors (see below), whose sum is σ = 1287885390. Its totient is φ = 332357504.

The previous prime is 664714997. The next prime is 664715039. The reversal of 664715024 is 420517466.

It can be written as a sum of positive squares in only one way, i.e., 574465024 + 90250000 = 23968^2 + 9500^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20772329 + ... + 20772360.

It is an arithmetic number, because the mean of its divisors is an integer number (128788539).

Almost surely, 2^664715024 is an apocalyptic number.

It is an amenable number.

664715024 is a deficient number, since it is larger than the sum of its proper divisors (623170366).

664715024 is a wasteful number, since it uses less digits than its factorization.

664715024 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41544697 (or 41544691 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 35.

The square root of 664715024 is about 25782.0678767239. The cubic root of 664715024 is about 872.7271730797.

The spelling of 664715024 in words is "six hundred sixty-four million, seven hundred fifteen thousand, twenty-four".