166745166 has 32 divisors (see below), whose sum is σ = 383927040. Its totient is φ = 47292096.

The previous prime is 166745153. The next prime is 166745171. The reversal of 166745166 is 661547661.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 8736 + ... + 20243.

It is an arithmetic number, because the mean of its divisors is an integer number (11997720).

Almost surely, 2^166745166 is an apocalyptic number.

166745166 is an abundant number, since it is smaller than the sum of its proper divisors (217181874).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

166745166 is a wasteful number, since it uses less digits than its factorization.

166745166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29128.

The product of its digits is 181440, while the sum is 42.

The square root of 166745166 is about 12912.9843955609. The cubic root of 166745166 is about 550.4075942839.

The spelling of 166745166 in words is "one hundred sixty-six million, seven hundred forty-five thousand, one hundred sixty-six".