66081428336 has 40 divisors (see below), whose sum is σ = 159625271424. Its totient is φ = 25746010560.

The previous prime is 66081428323. The next prime is 66081428341. The reversal of 66081428336 is 63382418066.

It is a congruent number.

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, 26817530 + ... + 26819993.

Almost surely, 2^66081428336 is an apocalyptic number.

It is an amenable number.

66081428336 is an abundant number, since it is smaller than the sum of its proper divisors (93543843088).

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

66081428336 is a wasteful number, since it uses less digits than its factorization.

66081428336 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53637549 (or 53637543 counting only the distinct ones).

The product of its (nonzero) digits is 995328, while the sum is 47.

The spelling of 66081428336 in words is "sixty-six billion, eighty-one million, four hundred twenty-eight thousand, three hundred thirty-six".