181670166 has 24 divisors (see below), whose sum is σ = 393920904. Its totient is φ = 60510240.

The previous prime is 181670161. The next prime is 181670171. The reversal of 181670166 is 661076181.

It is an interprime number because it is at equal distance from previous prime (181670161) and next prime (181670171).

It is a self number, because there is not a number n which added to its sum of digits gives 181670166.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (181670161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 26781 + ... + 32871.

It is an arithmetic number, because the mean of its divisors is an integer number (16413371).

Almost surely, 2^181670166 is an apocalyptic number.

181670166 is an abundant number, since it is smaller than the sum of its proper divisors (212250738).

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

181670166 is a wasteful number, since it uses less digits than its factorization.

181670166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7756 (or 7753 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 36.

The square root of 181670166 is about 13478.5075583315. The cubic root of 181670166 is about 566.3625620125.

The spelling of 181670166 in words is "one hundred eighty-one million, six hundred seventy thousand, one hundred sixty-six".