8331845466781 has 2 divisors, whose sum is σ = 8331845466782. Its totient is φ = 8331845466780.

The previous prime is 8331845466673. The next prime is 8331845466793. The reversal of 8331845466781 is 1876645481338.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7614040016025 + 717805450756 = 2759355^2 + 847234^2 .

It is a cyclic number.

It is not a de Polignac number, because 8331845466781 - 2⁷ = 8331845466653 is a prime.

It is a super-2 number, since 2×8331845466781² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8331845266781) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4165922733390 + 4165922733391.

It is an arithmetic number, because the mean of its divisors is an integer number (4165922733391).

Almost surely, 2^{8331845466781} is an apocalyptic number.

It is an amenable number.

8331845466781 is a deficient number, since it is larger than the sum of its proper divisors (1).

8331845466781 is an equidigital number, since it uses as much as digits as its factorization.

8331845466781 is an evil number, because the sum of its binary digits is even.

The product of its digits is 92897280, while the sum is 64.

The spelling of 8331845466781 in words is "eight trillion, three hundred thirty-one billion, eight hundred forty-five million, four hundred sixty-six thousand, seven hundred eighty-one".