166393668 has 24 divisors (see below), whose sum is σ = 443716672. Its totient is φ = 47541024.

The previous prime is 166393663. The next prime is 166393691. The reversal of 166393668 is 866393661.

It is not an unprimeable number, because it can be changed into a prime (166393663) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 990355 + ... + 990522.

Almost surely, 2^166393668 is an apocalyptic number.

It is an amenable number.

166393668 is an abundant number, since it is smaller than the sum of its proper divisors (277323004).

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

166393668 is a wasteful number, since it uses less digits than its factorization.

166393668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1980891 (or 1980889 counting only the distinct ones).

The product of its digits is 839808, while the sum is 48.

The square root of 166393668 is about 12899.3669612117. The cubic root of 166393668 is about 550.0205700296.

The spelling of 166393668 in words is "one hundred sixty-six million, three hundred ninety-three thousand, six hundred sixty-eight".