78512166 has 20 divisors (see below), whose sum is σ = 175925772. Its totient is φ = 26170668.

The previous prime is 78512153. The next prime is 78512177. The reversal of 78512166 is 66121587.

It is a self number, because there is not a number n which added to its sum of digits gives 78512166.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 242160 + ... + 242483.

Almost surely, 2^78512166 is an apocalyptic number.

78512166 is an abundant number, since it is smaller than the sum of its proper divisors (97413606).

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

78512166 is a wasteful number, since it uses less digits than its factorization.

78512166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 484657 (or 484648 counting only the distinct ones).

The product of its digits is 20160, while the sum is 36.

The square root of 78512166 is about 8860.7091138351. The cubic root of 78512166 is about 428.1990041749.

The spelling of 78512166 in words is "seventy-eight million, five hundred twelve thousand, one hundred sixty-six".