660328664 has 32 divisors (see below), whose sum is σ = 1259496000. Its totient is φ = 324510720.

The previous prime is 660328651. The next prime is 660328693. The reversal of 660328664 is 466823066.

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, 112769 + ... + 118479.

It is an arithmetic number, because the mean of its divisors is an integer number (39359250).

Almost surely, 2^660328664 is an apocalyptic number.

It is an amenable number.

660328664 is a deficient number, since it is larger than the sum of its proper divisors (599167336).

660328664 is a wasteful number, since it uses less digits than its factorization.

660328664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5963 (or 5959 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 41.

The square root of 660328664 is about 25696.8609756133. The cubic root of 660328664 is about 870.8032674545.

The spelling of 660328664 in words is "six hundred sixty million, three hundred twenty-eight thousand, six hundred sixty-four".