2668712781844 has 12 divisors (see below), whose sum is σ = 4680885748000. Its totient is φ = 1331316853848.

The previous prime is 2668712781803. The next prime is 2668712781859. The reversal of 2668712781844 is 4481872178662.

It is a happy number.

2668712781844 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×2668712781844² (a number of 26 digits) contains 22 as substring.

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, 759882294 + ... + 759885805.

Almost surely, 2^{2668712781844} is an apocalyptic number.

It is an amenable number.

2668712781844 is a deficient number, since it is larger than the sum of its proper divisors (2012172966156).

2668712781844 is a wasteful number, since it uses less digits than its factorization.

2668712781844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1519768542 (or 1519768540 counting only the distinct ones).

The product of its digits is 57802752, while the sum is 64.

The spelling of 2668712781844 in words is "two trillion, six hundred sixty-eight billion, seven hundred twelve million, seven hundred eighty-one thousand, eight hundred forty-four".