664752587 has 16 divisors (see below), whose sum is σ = 706060800. Its totient is φ = 624882720.

The previous prime is 664752577. The next prime is 664752589. The reversal of 664752587 is 785257466.

It is not a de Polignac number, because 664752587 - 2¹⁴ = 664736203 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (664752589) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 181262 + ... + 184892.

It is an arithmetic number, because the mean of its divisors is an integer number (44128800).

Almost surely, 2^664752587 is an apocalyptic number.

664752587 is a deficient number, since it is larger than the sum of its proper divisors (41308213).

664752587 is a wasteful number, since it uses less digits than its factorization.

664752587 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3826.

The product of its digits is 2822400, while the sum is 50.

The square root of 664752587 is about 25782.7963378684. The cubic root of 664752587 is about 872.7436120208.

The spelling of 664752587 in words is "six hundred sixty-four million, seven hundred fifty-two thousand, five hundred eighty-seven".