68017680582661 has 2 divisors, whose sum is σ = 68017680582662. Its totient is φ = 68017680582660.

The previous prime is 68017680582653. The next prime is 68017680582673. The reversal of 68017680582661 is 16628508671086.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 66878359170561 + 1139321412100 = 8177919^2 + 1067390^2 .

It is a cyclic number.

It is not a de Polignac number, because 68017680582661 - 2³ = 68017680582653 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 68017680582593 and 68017680582602.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68027680582661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34008840291330 + 34008840291331.

It is an arithmetic number, because the mean of its divisors is an integer number (34008840291331).

Almost surely, 2^{68017680582661} is an apocalyptic number.

It is an amenable number.

68017680582661 is a deficient number, since it is larger than the sum of its proper divisors (1).

68017680582661 is an equidigital number, since it uses as much as digits as its factorization.

68017680582661 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 46448640, while the sum is 64.

The spelling of 68017680582661 in words is "sixty-eight trillion, seventeen billion, six hundred eighty million, five hundred eighty-two thousand, six hundred sixty-one".