866763546746501 has 2 divisors, whose sum is σ = 866763546746502. Its totient is φ = 866763546746500.

The previous prime is 866763546746437. The next prime is 866763546746507. The reversal of 866763546746501 is 105647645367668.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 840458947048900 + 26304599697601 = 28990670^2 + 5128801^2 .

It is a cyclic number.

It is not a de Polignac number, because 866763546746501 - 2⁶ = 866763546746437 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (866763546746507) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 433381773373250 + 433381773373251.

It is an arithmetic number, because the mean of its divisors is an integer number (433381773373251).

Almost surely, 2^{866763546746501} is an apocalyptic number.

It is an amenable number.

866763546746501 is a deficient number, since it is larger than the sum of its proper divisors (1).

866763546746501 is an equidigital number, since it uses as much as digits as its factorization.

866763546746501 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3657830400, while the sum is 74.

The spelling of 866763546746501 in words is "eight hundred sixty-six trillion, seven hundred sixty-three billion, five hundred forty-six million, seven hundred forty-six thousand, five hundred one".