66504529128 has 32 divisors (see below), whose sum is σ = 167732668800. Its totient is φ = 21971996928.

The previous prime is 66504529109. The next prime is 66504529129. The reversal of 66504529128 is 82192540566.

It is not an unprimeable number, because it can be changed into a prime (66504529129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12258448 + ... + 12263871.

It is an arithmetic number, because the mean of its divisors is an integer number (5241645900).

Almost surely, 2^66504529128 is an apocalyptic number.

It is an amenable number.

66504529128 is an abundant number, since it is smaller than the sum of its proper divisors (101228139672).

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

66504529128 is a wasteful number, since it uses less digits than its factorization.

66504529128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24522441 (or 24522437 counting only the distinct ones).

The product of its (nonzero) digits is 1036800, while the sum is 48.

The spelling of 66504529128 in words is "sixty-six billion, five hundred four million, five hundred twenty-nine thousand, one hundred twenty-eight".