166191416 has 16 divisors (see below), whose sum is σ = 311745840. Its totient is φ = 83059200.

The previous prime is 166191401. The next prime is 166191433. The reversal of 166191416 is 614191661.

It is a Smith number, since the sum of its digits (35) 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 3 ways as a sum of consecutive naturals, for example, 32216 + ... + 37016.

It is an arithmetic number, because the mean of its divisors is an integer number (19484115).

Almost surely, 2^166191416 is an apocalyptic number.

It is an amenable number.

166191416 is a deficient number, since it is larger than the sum of its proper divisors (145554424).

166191416 is a wasteful number, since it uses less digits than its factorization.

166191416 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9134 (or 9130 counting only the distinct ones).

The product of its digits is 7776, while the sum is 35.

The square root of 166191416 is about 12891.5249679780. The cubic root of 166191416 is about 549.7976291286.

The spelling of 166191416 in words is "one hundred sixty-six million, one hundred ninety-one thousand, four hundred sixteen".