168868366685 has 4 divisors (see below), whose sum is σ = 202642040028. Its totient is φ = 135094693344.

The previous prime is 168868366669. The next prime is 168868366699. The reversal of 168868366685 is 586663868861.

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 109446503929 + 59421862756 = 330827^2 + 243766^2 .

It is a cyclic number.

It is not a de Polignac number, because 168868366685 - 2⁴ = 168868366669 is a prime.

It is a Duffinian 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, 16886836664 + ... + 16886836673.

It is an arithmetic number, because the mean of its divisors is an integer number (50660510007).

Almost surely, 2^168868366685 is an apocalyptic number.

It is an amenable number.

168868366685 is a deficient number, since it is larger than the sum of its proper divisors (33773673343).

168868366685 is an equidigital number, since it uses as much as digits as its factorization.

168868366685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33773673342.

The product of its digits is 477757440, while the sum is 71.

The spelling of 168868366685 in words is "one hundred sixty-eight billion, eight hundred sixty-eight million, three hundred sixty-six thousand, six hundred eighty-five".