166555158 has 32 divisors (see below), whose sum is σ = 415307520. Its totient is φ = 43260960.

The previous prime is 166555141. The next prime is 166555183. The reversal of 166555158 is 851555661.

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

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 179793 + ... + 180716.

It is an arithmetic number, because the mean of its divisors is an integer number (12978360).

Almost surely, 2^166555158 is an apocalyptic number.

166555158 is an abundant number, since it is smaller than the sum of its proper divisors (248752362).

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

166555158 is a wasteful number, since it uses less digits than its factorization.

166555158 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 360532.

The product of its digits is 180000, while the sum is 42.

The square root of 166555158 is about 12905.6250526660. The cubic root of 166555158 is about 550.1984495994.

The spelling of 166555158 in words is "one hundred sixty-six million, five hundred fifty-five thousand, one hundred fifty-eight".