78506166 has 8 divisors (see below), whose sum is σ = 157012344. Its totient is φ = 26168720.

The previous prime is 78506159. The next prime is 78506177. The reversal of 78506166 is 66160587.

It is a sphenic number, since it is the product of 3 distinct primes.

78506166 is an admirable number.

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, 6542175 + ... + 6542186.

It is an arithmetic number, because the mean of its divisors is an integer number (19626543).

Almost surely, 2^78506166 is an apocalyptic number.

78506166 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

78506166 is a wasteful number, since it uses less digits than its factorization.

78506166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13084366.

The product of its (nonzero) digits is 60480, while the sum is 39.

The square root of 78506166 is about 8860.3705340127. The cubic root of 78506166 is about 428.1880960587.

The spelling of 78506166 in words is "seventy-eight million, five hundred six thousand, one hundred sixty-six".