664596488 has 8 divisors (see below), whose sum is σ = 1246118430. Its totient is φ = 332298240.

The previous prime is 664596481. The next prime is 664596503. The reversal of 664596488 is 884695466.

It can be written as a sum of positive squares in only one way, i.e., 664505284 + 91204 = 25778^2 + 302^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (664596481) by changing a digit.

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, 41537273 + ... + 41537288.

Almost surely, 2^664596488 is an apocalyptic number.

It is an amenable number.

664596488 is a deficient number, since it is larger than the sum of its proper divisors (581521942).

664596488 is a wasteful number, since it uses less digits than its factorization.

664596488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83074567 (or 83074563 counting only the distinct ones).

The product of its digits is 9953280, while the sum is 56.

The square root of 664596488 is about 25779.7689671572. The cubic root of 664596488 is about 872.6752933346.

The spelling of 664596488 in words is "six hundred sixty-four million, five hundred ninety-six thousand, four hundred eighty-eight".