168668536670 has 16 divisors (see below), whose sum is σ = 303912237600. Its totient is φ = 67398776544.

The previous prime is 168668536669. The next prime is 168668536679. The reversal of 168668536670 is 76635866861.

It is a happy number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (168668536679) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8569445 + ... + 8589104.

It is an arithmetic number, because the mean of its divisors is an integer number (18994514850).

Almost surely, 2^168668536670 is an apocalyptic number.

168668536670 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

168668536670 is a deficient number, since it is larger than the sum of its proper divisors (135243700930).

168668536670 is a wasteful number, since it uses less digits than its factorization.

168668536670 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17159539.

The product of its (nonzero) digits is 52254720, while the sum is 62.

The spelling of 168668536670 in words is "one hundred sixty-eight billion, six hundred sixty-eight million, five hundred thirty-six thousand, six hundred seventy".