664711828 has 12 divisors (see below), whose sum is σ = 1268995392. Its totient is φ = 302141720.

The previous prime is 664711811. The next prime is 664711841. The reversal of 664711828 is 828117466.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7553500 + ... + 7553587.

It is an arithmetic number, because the mean of its divisors is an integer number (105749616).

Almost surely, 2^664711828 is an apocalyptic number.

It is an amenable number.

664711828 is a deficient number, since it is larger than the sum of its proper divisors (604283564).

664711828 is a wasteful number, since it uses less digits than its factorization.

664711828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15107102 (or 15107100 counting only the distinct ones).

The product of its digits is 129024, while the sum is 43.

The square root of 664711828 is about 25782.0058955854. The cubic root of 664711828 is about 872.7257743648.

The spelling of 664711828 in words is "six hundred sixty-four million, seven hundred eleven thousand, eight hundred twenty-eight".