166605055 has 16 divisors (see below), whose sum is σ = 203179104. Its totient is φ = 131132800.

The previous prime is 166605037. The next prime is 166605059. The reversal of 166605055 is 550506661.

It is not a de Polignac number, because 166605055 - 2⁷ = 166604927 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 166605055.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166605059) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 86412 + ... + 88318.

It is an arithmetic number, because the mean of its divisors is an integer number (12698694).

Almost surely, 2^166605055 is an apocalyptic number.

166605055 is a deficient number, since it is larger than the sum of its proper divisors (36574049).

166605055 is a wasteful number, since it uses less digits than its factorization.

166605055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2186.

The product of its (nonzero) digits is 27000, while the sum is 34.

The square root of 166605055 is about 12907.5580572004. The cubic root of 166605055 is about 550.2533873776.

The spelling of 166605055 in words is "one hundred sixty-six million, six hundred five thousand, fifty-five".