168668376731 has 8 divisors (see below), whose sum is σ = 169035266400. Its totient is φ = 168301851840.

The previous prime is 168668376659. The next prime is 168668376761. The reversal of 168668376731 is 137673866861.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-168668376731 is a prime.

It is a super-2 number, since 2×168668376731² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (168668376761) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 844991 + ... + 1025351.

It is an arithmetic number, because the mean of its divisors is an integer number (21129408300).

Almost surely, 2^168668376731 is an apocalyptic number.

168668376731 is a deficient number, since it is larger than the sum of its proper divisors (366889669).

168668376731 is a wasteful number, since it uses less digits than its factorization.

168668376731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 182389.

The product of its digits is 36578304, while the sum is 62.

The spelling of 168668376731 in words is "one hundred sixty-eight billion, six hundred sixty-eight million, three hundred seventy-six thousand, seven hundred thirty-one".