78885166 has 4 divisors (see below), whose sum is σ = 118327752. Its totient is φ = 39442582.

The previous prime is 78885143. The next prime is 78885167. The reversal of 78885166 is 66158887.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78885167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19721290 + ... + 19721293.

It is an arithmetic number, because the mean of its divisors is an integer number (29581938).

Almost surely, 2^78885166 is an apocalyptic number.

78885166 is a deficient number, since it is larger than the sum of its proper divisors (39442586).

78885166 is a wasteful number, since it uses less digits than its factorization.

78885166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39442585.

The product of its digits is 645120, while the sum is 49.

The square root of 78885166 is about 8881.7321508814. The cubic root of 78885166 is about 428.8760370874.

The spelling of 78885166 in words is "seventy-eight million, eight hundred eighty-five thousand, one hundred sixty-six".