660128642800 has 60 divisors (see below), whose sum is σ = 1730137172616. Its totient is φ = 240046777600.

The previous prime is 660128642731. The next prime is 660128642893. The reversal of 660128642800 is 8246821066.

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 75010219 + ... + 75019018.

Almost surely, 2^660128642800 is an apocalyptic number.

It is an amenable number.

660128642800 is an abundant number, since it is smaller than the sum of its proper divisors (1070008529816).

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

660128642800 is a wasteful number, since it uses less digits than its factorization.

660128642800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150029266 (or 150029255 counting only the distinct ones).

The product of its (nonzero) digits is 221184, while the sum is 43.

The spelling of 660128642800 in words is "six hundred sixty billion, one hundred twenty-eight million, six hundred forty-two thousand, eight hundred".