664389675 has 48 divisors (see below), whose sum is σ = 1259919360. Its totient is φ = 342900000.

The previous prime is 664389667. The next prime is 664389679. The reversal of 664389675 is 576983466.

664389675 is digitally balanced in base 2 and base 6, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 664389675 - 2³ = 664389667 is a prime.

It is not an unprimeable number, because it can be changed into a prime (664389679) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 5050 + ... + 36800.

It is an arithmetic number, because the mean of its divisors is an integer number (26248320).

Almost surely, 2^664389675 is an apocalyptic number.

664389675 is a deficient number, since it is larger than the sum of its proper divisors (595529685).

664389675 is a wasteful number, since it uses less digits than its factorization.

664389675 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31801 (or 31790 counting only the distinct ones).

The product of its digits is 6531840, while the sum is 54.

The square root of 664389675 is about 25775.7575058426. The cubic root of 664389675 is about 872.5847625525.

The spelling of 664389675 in words is "six hundred sixty-four million, three hundred eighty-nine thousand, six hundred seventy-five".