85178668 has 12 divisors (see below), whose sum is σ = 149334192. Its totient is φ = 42511760.

The previous prime is 85178651. The next prime is 85178677. The reversal of 85178668 is 86687158.

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 3 ways as a sum of consecutive naturals, for example, 16888 + ... + 21343.

It is an arithmetic number, because the mean of its divisors is an integer number (12444516).

Almost surely, 2^85178668 is an apocalyptic number.

It is an amenable number.

85178668 is a deficient number, since it is larger than the sum of its proper divisors (64155524).

85178668 is a wasteful number, since it uses less digits than its factorization.

85178668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38792 (or 38790 counting only the distinct ones).

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

The square root of 85178668 is about 9229.2290035517. The cubic root of 85178668 is about 439.9908193677.

Subtracting from 85178668 its product of digits (645120), we obtain a palindrome (84533548).

The spelling of 85178668 in words is "eighty-five million, one hundred seventy-eight thousand, six hundred sixty-eight".