166389164 has 6 divisors (see below), whose sum is σ = 291181044. Its totient is φ = 83194580.

The previous prime is 166389163. The next prime is 166389169. The reversal of 166389164 is 461983661.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (166389161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20798642 + ... + 20798649.

It is an arithmetic number, because the mean of its divisors is an integer number (48530174).

Almost surely, 2^166389164 is an apocalyptic number.

It is an amenable number.

166389164 is a deficient number, since it is larger than the sum of its proper divisors (124791880).

166389164 is a wasteful number, since it uses less digits than its factorization.

166389164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41597295 (or 41597293 counting only the distinct ones).

The product of its digits is 186624, while the sum is 44.

The square root of 166389164 is about 12899.1923778196. The cubic root of 166389164 is about 550.0156072706.

The spelling of 166389164 in words is "one hundred sixty-six million, three hundred eighty-nine thousand, one hundred sixty-four".