66189045122 has 6 divisors (see below), whose sum is σ = 99284113443. Its totient is φ = 33094340642.

The previous prime is 66189045101. The next prime is 66189045137. The reversal of 66189045122 is 22154098166.

66189045122 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 33094522561 + 33094522561 = 181919^2 + 181919^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=181919.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 272879 + ... + 454797.

Almost surely, 2^66189045122 is an apocalyptic number.

66189045122 is a deficient number, since it is larger than the sum of its proper divisors (33095068321).

66189045122 is an frugal number, since it uses more digits than its factorization.

66189045122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 363840 (or 181921 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 44.

The spelling of 66189045122 in words is "sixty-six billion, one hundred eighty-nine million, forty-five thousand, one hundred twenty-two".