66321586888460 has 48 divisors (see below), whose sum is σ = 150018871468032. Its totient is φ = 24556660497600.

The previous prime is 66321586888423. The next prime is 66321586888481. The reversal of 66321586888460 is 6488868512366.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2325427076 + ... + 2325455595.

It is an arithmetic number, because the mean of its divisors is an integer number (3125393155584).

Almost surely, 2^{66321586888460} is an apocalyptic number.

It is an amenable number.

66321586888460 is an abundant number, since it is smaller than the sum of its proper divisors (83697284579572).

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

66321586888460 is a wasteful number, since it uses less digits than its factorization.

66321586888460 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4650882734 (or 4650882732 counting only the distinct ones).

The product of its (nonzero) digits is 637009920, while the sum is 71.

The spelling of 66321586888460 in words is "sixty-six trillion, three hundred twenty-one billion, five hundred eighty-six million, eight hundred eighty-eight thousand, four hundred sixty".