166105444 has 12 divisors (see below), whose sum is σ = 290774764. Its totient is φ = 83026944.

The previous prime is 166105403. The next prime is 166105447. The reversal of 166105444 is 444501661.

It can be written as a sum of positive squares in 2 ways, for example, as 57153600 + 108951844 = 7560^2 + 10438^2 .

It is not an unprimeable number, because it can be changed into a prime (166105447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22072 + ... + 28624.

Almost surely, 2^166105444 is an apocalyptic number.

It is an amenable number.

166105444 is a deficient number, since it is larger than the sum of its proper divisors (124669320).

166105444 is a wasteful number, since it uses less digits than its factorization.

166105444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12894 (or 12892 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 31.

The square root of 166105444 is about 12888.1900979152. The cubic root of 166105444 is about 549.7028080366.

The spelling of 166105444 in words is "one hundred sixty-six million, one hundred five thousand, four hundred forty-four".