166143918 has 16 divisors (see below), whose sum is σ = 332954496. Its totient is φ = 55270200.

The previous prime is 166143917. The next prime is 166143937. The reversal of 166143918 is 819341661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166143917) 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 7 ways as a sum of consecutive naturals, for example, 24508 + ... + 30543.

It is an arithmetic number, because the mean of its divisors is an integer number (20809656).

Almost surely, 2^166143918 is an apocalyptic number.

166143918 is an abundant number, since it is smaller than the sum of its proper divisors (166810578).

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

166143918 is a wasteful number, since it uses less digits than its factorization.

166143918 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55559.

The product of its digits is 31104, while the sum is 39.

The square root of 166143918 is about 12889.6826182804. The cubic root of 166143918 is about 549.7452462065.

The spelling of 166143918 in words is "one hundred sixty-six million, one hundred forty-three thousand, nine hundred eighteen".