1664608328 has 32 divisors (see below), whose sum is σ = 3144744000. Its totient is φ = 826034880.

The previous prime is 1664608327. The next prime is 1664608349. The reversal of 1664608328 is 8238064661.

It is not an unprimeable number, because it can be changed into a prime (1664608327) 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, 656423 + ... + 658953.

It is an arithmetic number, because the mean of its divisors is an integer number (98273250).

Almost surely, 2^1664608328 is an apocalyptic number.

It is an amenable number.

1664608328 is a deficient number, since it is larger than the sum of its proper divisors (1480135672).

1664608328 is a wasteful number, since it uses less digits than its factorization.

1664608328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3125 (or 3121 counting only the distinct ones).

The product of its (nonzero) digits is 331776, while the sum is 44.

The square root of 1664608328 is about 40799.6118608989. The cubic root of 1664608328 is about 1185.1428143613.

The spelling of 1664608328 in words is "one billion, six hundred sixty-four million, six hundred eight thousand, three hundred twenty-eight".