2668175327621 has 2 divisors, whose sum is σ = 2668175327622. Its totient is φ = 2668175327620.

The previous prime is 2668175327563. The next prime is 2668175327669. The reversal of 2668175327621 is 1267235718662.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2667031941025 + 1143386596 = 1633105^2 + 33814^2 .

It is a cyclic number.

It is not a de Polignac number, because 2668175327621 - 2¹⁸ = 2668175065477 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2668175327821) by changing a digit.

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 as a sum of consecutive naturals, namely, 1334087663810 + 1334087663811.

It is an arithmetic number, because the mean of its divisors is an integer number (1334087663811).

Almost surely, 2^{2668175327621} is an apocalyptic number.

It is an amenable number.

2668175327621 is a deficient number, since it is larger than the sum of its proper divisors (1).

2668175327621 is an equidigital number, since it uses as much as digits as its factorization.

2668175327621 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10160640, while the sum is 56.

The spelling of 2668175327621 in words is "two trillion, six hundred sixty-eight billion, one hundred seventy-five million, three hundred twenty-seven thousand, six hundred twenty-one".