66625486884 has 72 divisors (see below), whose sum is σ = 186467063328. Its totient is φ = 19888197120.

The previous prime is 66625486871. The next prime is 66625486901. The reversal of 66625486884 is 48868452666.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1229037 + ... + 1282100.

It is an arithmetic number, because the mean of its divisors is an integer number (2589820324).

Almost surely, 2^66625486884 is an apocalyptic number.

It is an amenable number.

66625486884 is an abundant number, since it is smaller than the sum of its proper divisors (119841576444).

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

66625486884 is a wasteful number, since it uses less digits than its factorization.

66625486884 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2511225 (or 2511220 counting only the distinct ones).

The product of its digits is 106168320, while the sum is 63.

The spelling of 66625486884 in words is "sixty-six billion, six hundred twenty-five million, four hundred eighty-six thousand, eight hundred eighty-four".