866763546746393 has 2 divisors, whose sum is σ = 866763546746394. Its totient is φ = 866763546746392.

The previous prime is 866763546746381. The next prime is 866763546746437. The reversal of 866763546746393 is 393647645367668.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 849953850145024 + 16809696601369 = 29153968^2 + 4099963^2 .

It is a cyclic number.

It is not a de Polignac number, because 866763546746393 - 2¹⁸ = 866763546484249 is a prime.

It is not a weakly prime, because it can be changed into another prime (866763546746303) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 433381773373196 + 433381773373197.

It is an arithmetic number, because the mean of its divisors is an integer number (433381773373197).

Almost surely, 2^{866763546746393} is an apocalyptic number.

It is an amenable number.

866763546746393 is a deficient number, since it is larger than the sum of its proper divisors (1).

866763546746393 is an equidigital number, since it uses as much as digits as its factorization.

866763546746393 is an evil number, because the sum of its binary digits is even.

The product of its digits is 59256852480, while the sum is 83.

The spelling of 866763546746393 in words is "eight hundred sixty-six trillion, seven hundred sixty-three billion, five hundred forty-six million, seven hundred forty-six thousand, three hundred ninety-three".