66658628872 has 64 divisors (see below), whose sum is σ = 151965979200. Its totient is φ = 27016151040.

The previous prime is 66658628857. The next prime is 66658628873. The reversal of 66658628872 is 27882685666.

It is not an unprimeable number, because it can be changed into a prime (66658628873) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 1144153 + ... + 1201000.

It is an arithmetic number, because the mean of its divisors is an integer number (2374468425).

Almost surely, 2^66658628872 is an apocalyptic number.

It is an amenable number.

66658628872 is an abundant number, since it is smaller than the sum of its proper divisors (85307350328).

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

66658628872 is a wasteful number, since it uses less digits than its factorization.

66658628872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2345206 (or 2345202 counting only the distinct ones).

The product of its digits is 92897280, while the sum is 64.

The spelling of 66658628872 in words is "sixty-six billion, six hundred fifty-eight million, six hundred twenty-eight thousand, eight hundred seventy-two".