66662474784 has 48 divisors (see below), whose sum is σ = 175607403552. Its totient is φ = 22142297088.

The previous prime is 66662474771. The next prime is 66662474849. The reversal of 66662474784 is 48747426666.

It is a tau number, because it is divible by the number of its divisors (48).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1199689 + ... + 1254024.

It is an arithmetic number, because the mean of its divisors is an integer number (3658487574).

Almost surely, 2^66662474784 is an apocalyptic number.

It is an amenable number.

66662474784 is an abundant number, since it is smaller than the sum of its proper divisors (108944928768).

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

66662474784 is a wasteful number, since it uses less digits than its factorization.

66662474784 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2454009 (or 2454001 counting only the distinct ones).

The product of its digits is 65028096, while the sum is 60.

The spelling of 66662474784 in words is "sixty-six billion, six hundred sixty-two million, four hundred seventy-four thousand, seven hundred eighty-four".