166849155 has 24 divisors (see below), whose sum is σ = 315497520. Its totient is φ = 80896320.

The previous prime is 166849147. The next prime is 166849181. The reversal of 166849155 is 551948661.

It is not a de Polignac number, because 166849155 - 2³ = 166849147 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 166849155.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 168040 + ... + 169029.

It is an arithmetic number, because the mean of its divisors is an integer number (13145730).

Almost surely, 2^166849155 is an apocalyptic number.

166849155 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

166849155 is a deficient number, since it is larger than the sum of its proper divisors (148648365).

166849155 is a wasteful number, since it uses less digits than its factorization.

166849155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 337091 (or 337088 counting only the distinct ones).

The product of its digits is 259200, while the sum is 45.

The square root of 166849155 is about 12917.0102965044. The cubic root of 166849155 is about 550.5219892866.

The spelling of 166849155 in words is "one hundred sixty-six million, eight hundred forty-nine thousand, one hundred fifty-five".