2668837921780 has 12 divisors (see below), whose sum is σ = 5604559635780. Its totient is φ = 1067535168704.

The previous prime is 2668837921777. The next prime is 2668837921807. The reversal of 2668837921780 is 871297388662.

It can be written as a sum of positive squares in 2 ways, for example, as 648920469136 + 2019917452644 = 805556^2 + 1421238^2 .

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, 66720948025 + ... + 66720948064.

It is an arithmetic number, because the mean of its divisors is an integer number (467046636315).

Almost surely, 2^{2668837921780} is an apocalyptic number.

2668837921780 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2668837921780 is an abundant number, since it is smaller than the sum of its proper divisors (2935721714000).

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

2668837921780 is a wasteful number, since it uses less digits than its factorization.

2668837921780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133441896098 (or 133441896096 counting only the distinct ones).

The product of its (nonzero) digits is 97542144, while the sum is 67.

The spelling of 2668837921780 in words is "two trillion, six hundred sixty-eight billion, eight hundred thirty-seven million, nine hundred twenty-one thousand, seven hundred eighty".