85178666 has 8 divisors (see below), whose sum is σ = 127807524. Its totient is φ = 42576160.

The previous prime is 85178651. The next prime is 85178677. The reversal of 85178666 is 66687158.

It can be written as a sum of positive squares in 2 ways, for example, as 85174441 + 4225 = 9229^2 + 65^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 85178666.

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, 7646 + ... + 15126.

Almost surely, 2^85178666 is an apocalyptic number.

85178666 is a deficient number, since it is larger than the sum of its proper divisors (42628858).

85178666 is a wasteful number, since it uses less digits than its factorization.

85178666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13176.

The product of its digits is 483840, while the sum is 47.

The square root of 85178666 is about 9229.2288952003. The cubic root of 85178666 is about 439.9908159240.

The spelling of 85178666 in words is "eighty-five million, one hundred seventy-eight thousand, six hundred sixty-six".