166161814 has 24 divisors (see below), whose sum is σ = 308450160. Its totient is φ = 65733408.

The previous prime is 166161811. The next prime is 166161871. The reversal of 166161814 is 418161661.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 166161814.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166161811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 32749 + ... + 37480.

It is an arithmetic number, because the mean of its divisors is an integer number (12852090).

Almost surely, 2^166161814 is an apocalyptic number.

166161814 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

166161814 is a deficient number, since it is larger than the sum of its proper divisors (142288346).

166161814 is a wasteful number, since it uses less digits than its factorization.

166161814 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70264 (or 70251 counting only the distinct ones).

The product of its digits is 6912, while the sum is 34.

The square root of 166161814 is about 12890.3767982166. The cubic root of 166161814 is about 549.7649838890.

The spelling of 166161814 in words is "one hundred sixty-six million, one hundred sixty-one thousand, eight hundred fourteen".