664502768 has 40 divisors (see below), whose sum is σ = 1322259120. Its totient is φ = 323389440.

The previous prime is 664502753. The next prime is 664502777. The reversal of 664502768 is 867205466.

664502768 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 91163 + ... + 98181.

It is an arithmetic number, because the mean of its divisors is an integer number (33056478).

Almost surely, 2^664502768 is an apocalyptic number.

It is an amenable number.

664502768 is a deficient number, since it is larger than the sum of its proper divisors (657756352).

664502768 is a wasteful number, since it uses less digits than its factorization.

664502768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7185 (or 7179 counting only the distinct ones).

The product of its (nonzero) digits is 483840, while the sum is 44.

The square root of 664502768 is about 25777.9511986504. The cubic root of 664502768 is about 872.6342704610.

The spelling of 664502768 in words is "six hundred sixty-four million, five hundred two thousand, seven hundred sixty-eight".