68066813412 has 36 divisors (see below), whose sum is σ = 185292993340. Its totient is φ = 20943634752.

The previous prime is 68066813371. The next prime is 68066813489. The reversal of 68066813412 is 21431866086.

It can be written as a sum of positive squares in 2 ways, for example, as 9645989796 + 58420823616 = 98214^2 + 241704^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 72720487 + ... + 72721422.

Almost surely, 2^68066813412 is an apocalyptic number.

It is an amenable number.

68066813412 is an abundant number, since it is smaller than the sum of its proper divisors (117226179928).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

68066813412 is a wasteful number, since it uses less digits than its factorization.

68066813412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145441932 (or 145441927 counting only the distinct ones).

The product of its (nonzero) digits is 331776, while the sum is 45.

The spelling of 68066813412 in words is "sixty-eight billion, sixty-six million, eight hundred thirteen thousand, four hundred twelve".