66321120175 has 12 divisors (see below), whose sum is σ = 82600478856. Its totient is φ = 52823160800.

The previous prime is 66321120157. The next prime is 66321120199. The reversal of 66321120175 is 57102112366.

It is not a de Polignac number, because 66321120175 - 2⁵ = 66321120143 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 66321120175.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5837596 + ... + 5848945.

It is an arithmetic number, because the mean of its divisors is an integer number (6883373238).

Almost surely, 2^66321120175 is an apocalyptic number.

66321120175 is a deficient number, since it is larger than the sum of its proper divisors (16279358681).

66321120175 is a wasteful number, since it uses less digits than its factorization.

66321120175 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11686778 (or 11686773 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 34.

It can be divided in two parts, 663211 and 20175, that added together give a palindrome (683386).

The spelling of 66321120175 in words is "sixty-six billion, three hundred twenty-one million, one hundred twenty thousand, one hundred seventy-five".