66644160204 has 12 divisors (see below), whose sum is σ = 155503040504. Its totient is φ = 22214720064.

The previous prime is 66644160199. The next prime is 66644160241. The reversal of 66644160204 is 40206144666.

66644160204 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (12).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2776839997 + ... + 2776840020.

Almost surely, 2^66644160204 is an apocalyptic number.

It is an amenable number.

66644160204 is an abundant number, since it is smaller than the sum of its proper divisors (88858880300).

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

66644160204 is a wasteful number, since it uses less digits than its factorization.

66644160204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5553680024 (or 5553680022 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 39.

The spelling of 66644160204 in words is "sixty-six billion, six hundred forty-four million, one hundred sixty thousand, two hundred four".