866763322228493 has 2 divisors, whose sum is σ = 866763322228494. Its totient is φ = 866763322228492.

The previous prime is 866763322228313. The next prime is 866763322228501. The reversal of 866763322228493 is 394822223367668.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 851443628763049 + 15319693465444 = 29179507^2 + 3914038^2 .

It is a cyclic number.

It is not a de Polignac number, because 866763322228493 - 2¹⁸ = 866763321966349 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (866763322228093) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 433381661114246 + 433381661114247.

It is an arithmetic number, because the mean of its divisors is an integer number (433381661114247).

Almost surely, 2^{866763322228493} is an apocalyptic number.

It is an amenable number.

866763322228493 is a deficient number, since it is larger than the sum of its proper divisors (1).

866763322228493 is an equidigital number, since it uses as much as digits as its factorization.

866763322228493 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1504935936, while the sum is 71.

The spelling of 866763322228493 in words is "eight hundred sixty-six trillion, seven hundred sixty-three billion, three hundred twenty-two million, two hundred twenty-eight thousand, four hundred ninety-three".