68665851874 has 8 divisors (see below), whose sum is σ = 103370615388. Its totient is φ = 34208980080.

The previous prime is 68665851853. The next prime is 68665851901. The reversal of 68665851874 is 47815856686.

It can be written as a sum of positive squares in 2 ways, for example, as 51912432649 + 16753419225 = 227843^2 + 129435^2 .

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

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, 61972237 + ... + 61973344.

Almost surely, 2^68665851874 is an apocalyptic number.

68665851874 is a deficient number, since it is larger than the sum of its proper divisors (34704763514).

68665851874 is a wasteful number, since it uses less digits than its factorization.

68665851874 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123945860.

The product of its digits is 77414400, while the sum is 64.

The spelling of 68665851874 in words is "sixty-eight billion, six hundred sixty-five million, eight hundred fifty-one thousand, eight hundred seventy-four".