66631928496 has 40 divisors (see below), whose sum is σ = 196722837504. Its totient is φ = 19037693760.

The previous prime is 66631928479. The next prime is 66631928501. The reversal of 66631928496 is 69482913666.

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, 99154320 + ... + 99154991.

Almost surely, 2^66631928496 is an apocalyptic number.

It is an amenable number.

66631928496 is an abundant number, since it is smaller than the sum of its proper divisors (130090909008).

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

66631928496 is a wasteful number, since it uses less digits than its factorization.

66631928496 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 198309329 (or 198309323 counting only the distinct ones).

The product of its digits is 20155392, while the sum is 60.

The spelling of 66631928496 in words is "sixty-six billion, six hundred thirty-one million, nine hundred twenty-eight thousand, four hundred ninety-six".