78945166 has 4 divisors (see below), whose sum is σ = 118417752. Its totient is φ = 39472582.

The previous prime is 78945157. The next prime is 78945187. The reversal of 78945166 is 66154987.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19736290 + ... + 19736293.

It is an arithmetic number, because the mean of its divisors is an integer number (29604438).

Almost surely, 2^78945166 is an apocalyptic number.

78945166 is a deficient number, since it is larger than the sum of its proper divisors (39472586).

78945166 is a wasteful number, since it uses less digits than its factorization.

78945166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39472585.

The product of its digits is 362880, while the sum is 46.

The square root of 78945166 is about 8885.1092283663. The cubic root of 78945166 is about 428.9847437988.

The spelling of 78945166 in words is "seventy-eight million, nine hundred forty-five thousand, one hundred sixty-six".