166120555522 has 16 divisors (see below), whose sum is σ = 257793642360. Its totient is φ = 80189794048.

The previous prime is 166120555501. The next prime is 166120555541. The reversal of 166120555522 is 225555021661.

166120555522 is digitally balanced in base 3, 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 4 ways, for example, as 161669130561 + 4451424961 = 402081^2 + 66719^2 .

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, 674088 + ... + 886924.

Almost surely, 2^166120555522 is an apocalyptic number.

166120555522 is a deficient number, since it is larger than the sum of its proper divisors (91673086838).

166120555522 is a wasteful number, since it uses less digits than its factorization.

166120555522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 226325.

The product of its (nonzero) digits is 180000, while the sum is 40.

The spelling of 166120555522 in words is "one hundred sixty-six billion, one hundred twenty million, five hundred fifty-five thousand, five hundred twenty-two".