66668865328 has 40 divisors (see below), whose sum is σ = 139327881056. Its totient is φ = 30721420800.

The previous prime is 66668865317. The next prime is 66668865353. The reversal of 66668865328 is 82356886666.

It is a self number, because there is not a number n which added to its sum of digits gives 66668865328.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 122733 + ... + 385228.

Almost surely, 2^66668865328 is an apocalyptic number.

It is an amenable number.

66668865328 is an abundant number, since it is smaller than the sum of its proper divisors (72659015728).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66668865328 is a wasteful number, since it uses less digits than its factorization.

66668865328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 508613 (or 508607 counting only the distinct ones).

The product of its digits is 119439360, while the sum is 64.

The spelling of 66668865328 in words is "sixty-six billion, six hundred sixty-eight million, eight hundred sixty-five thousand, three hundred twenty-eight".