78500166 has 16 divisors (see below), whose sum is σ = 157799664. Its totient is φ = 26033504.

The previous prime is 78500159. The next prime is 78500171. The reversal of 78500166 is 66100587.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32025 + ... + 34388.

It is an arithmetic number, because the mean of its divisors is an integer number (9862479).

Almost surely, 2^78500166 is an apocalyptic number.

78500166 is an abundant number, since it is smaller than the sum of its proper divisors (79299498).

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

78500166 is a wasteful number, since it uses less digits than its factorization.

78500166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66615.

The product of its (nonzero) digits is 10080, while the sum is 33.

The square root of 78500166 is about 8860.0319412517. The cubic root of 78500166 is about 428.1771873868.

The spelling of 78500166 in words is "seventy-eight million, five hundred thousand, one hundred sixty-six".