664488587 has 8 divisors (see below), whose sum is σ = 779940576. Its totient is φ = 554167872.

The previous prime is 664488581. The next prime is 664488619. The reversal of 664488587 is 785884466.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 664488587 - 2¹⁰ = 664487563 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (664488581) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1282538 + ... + 1283055.

It is an arithmetic number, because the mean of its divisors is an integer number (97492572).

Almost surely, 2^664488587 is an apocalyptic number.

664488587 is a deficient number, since it is larger than the sum of its proper divisors (115451989).

664488587 is a wasteful number, since it uses less digits than its factorization.

664488587 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2565637.

The product of its digits is 10321920, while the sum is 56.

The square root of 664488587 is about 25777.6761365333. The cubic root of 664488587 is about 872.6280628547.

The spelling of 664488587 in words is "six hundred sixty-four million, four hundred eighty-eight thousand, five hundred eighty-seven".