166207155 has 32 divisors (see below), whose sum is σ = 281629440. Its totient is φ = 83468160.

The previous prime is 166207133. The next prime is 166207157. The reversal of 166207155 is 551702661.

It is not a de Polignac number, because 166207155 - 2⁵ = 166207123 is a prime.

It is not an unprimeable number, because it can be changed into a prime (166207157) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 47620 + ... + 50990.

It is an arithmetic number, because the mean of its divisors is an integer number (8800920).

Almost surely, 2^166207155 is an apocalyptic number.

166207155 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

166207155 is a deficient number, since it is larger than the sum of its proper divisors (115422285).

166207155 is a wasteful number, since it uses less digits than its factorization.

166207155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3571.

The product of its (nonzero) digits is 12600, while the sum is 33.

The square root of 166207155 is about 12892.1353933319. The cubic root of 166207155 is about 549.8149846013.

The spelling of 166207155 in words is "one hundred sixty-six million, two hundred seven thousand, one hundred fifty-five".