66167521204 has 48 divisors (see below), whose sum is σ = 127682755200. Its totient is φ = 29862936576.

The previous prime is 66167521187. The next prime is 66167521213. The reversal of 66167521204 is 40212576166.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 375592 + ... + 522880.

It is an arithmetic number, because the mean of its divisors is an integer number (2660057400).

Almost surely, 2^66167521204 is an apocalyptic number.

It is an amenable number.

66167521204 is a deficient number, since it is larger than the sum of its proper divisors (61515233996).

66167521204 is a wasteful number, since it uses less digits than its factorization.

66167521204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147592 (or 147590 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 40.

The spelling of 66167521204 in words is "sixty-six billion, one hundred sixty-seven million, five hundred twenty-one thousand, two hundred four".