681468066827 has 2 divisors, whose sum is σ = 681468066828. Its totient is φ = 681468066826.

The previous prime is 681468066793. The next prime is 681468066847. The reversal of 681468066827 is 728660864186.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 681468066827 - 2²⁰ = 681467018251 is a prime.

It is a super-2 number, since 2×681468066827² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 681468066827.

It is not a weakly prime, because it can be changed into another prime (681468066847) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 340734033413 + 340734033414.

It is an arithmetic number, because the mean of its divisors is an integer number (340734033414).

Almost surely, 2^681468066827 is an apocalyptic number.

681468066827 is a deficient number, since it is larger than the sum of its proper divisors (1).

681468066827 is an equidigital number, since it uses as much as digits as its factorization.

681468066827 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 37158912, while the sum is 62.

The spelling of 681468066827 in words is "six hundred eighty-one billion, four hundred sixty-eight million, sixty-six thousand, eight hundred twenty-seven".