166200155 has 12 divisors (see below), whose sum is σ = 219220176. Its totient is φ = 120872400.

The previous prime is 166200077. The next prime is 166200157. The reversal of 166200155 is 551002661.

It is not a de Polignac number, because 166200155 - 2¹⁸ = 165938011 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (166200157) 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 11 ways as a sum of consecutive naturals, for example, 136751 + ... + 137960.

It is an arithmetic number, because the mean of its divisors is an integer number (18268348).

Almost surely, 2^166200155 is an apocalyptic number.

166200155 is a deficient number, since it is larger than the sum of its proper divisors (53020021).

166200155 is a wasteful number, since it uses less digits than its factorization.

166200155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 274738 (or 274727 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 26.

The square root of 166200155 is about 12891.8639071315. The cubic root of 166200155 is about 549.8072658022.

The spelling of 166200155 in words is "one hundred sixty-six million, two hundred thousand, one hundred fifty-five".