166396188 has 24 divisors (see below), whose sum is σ = 443723392. Its totient is φ = 47541744.

The previous prime is 166396177. The next prime is 166396193. The reversal of 166396188 is 881693661.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 990370 + ... + 990537.

Almost surely, 2^166396188 is an apocalyptic number.

It is an amenable number.

166396188 is an abundant number, since it is smaller than the sum of its proper divisors (277327204).

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

166396188 is a wasteful number, since it uses less digits than its factorization.

166396188 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1980921 (or 1980919 counting only the distinct ones).

The product of its digits is 373248, while the sum is 48.

The square root of 166396188 is about 12899.4646400539. The cubic root of 166396188 is about 550.0233466674.

The spelling of 166396188 in words is "one hundred sixty-six million, three hundred ninety-six thousand, one hundred eighty-eight".