168078685 has 4 divisors (see below), whose sum is σ = 201694428. Its totient is φ = 134462944.

The previous prime is 168078671. The next prime is 168078697. The reversal of 168078685 is 586870861.

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

It can be written as a sum of positive squares in 2 ways, for example, as 55442916 + 112635769 = 7446^2 + 10613^2 .

It is a cyclic number.

It is not a de Polignac number, because 168078685 - 2⁹ = 168078173 is a prime.

It is a Duffinian number.

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 3 ways as a sum of consecutive naturals, for example, 16807864 + ... + 16807873.

It is an arithmetic number, because the mean of its divisors is an integer number (50423607).

Almost surely, 2^168078685 is an apocalyptic number.

It is an amenable number.

168078685 is a deficient number, since it is larger than the sum of its proper divisors (33615743).

168078685 is an equidigital number, since it uses as much as digits as its factorization.

168078685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33615742.

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

The square root of 168078685 is about 12964.5163812616. The cubic root of 168078685 is about 551.8709670484.

The spelling of 168078685 in words is "one hundred sixty-eight million, seventy-eight thousand, six hundred eighty-five".