866800082636573 has 2 divisors, whose sum is σ = 866800082636574. Its totient is φ = 866800082636572.

The previous prime is 866800082636557. The next prime is 866800082636639. The reversal of 866800082636573 is 375636280008668.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 717397815824089 + 149402266812484 = 26784283^2 + 12223022^2 .

It is a cyclic number.

It is not a de Polignac number, because 866800082636573 - 2⁴ = 866800082636557 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (866800082635573) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 433400041318286 + 433400041318287.

It is an arithmetic number, because the mean of its divisors is an integer number (433400041318287).

Almost surely, 2^{866800082636573} is an apocalyptic number.

It is an amenable number.

866800082636573 is a deficient number, since it is larger than the sum of its proper divisors (1).

866800082636573 is an equidigital number, since it uses as much as digits as its factorization.

866800082636573 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 418037760, while the sum is 68.

The spelling of 866800082636573 in words is "eight hundred sixty-six trillion, eight hundred billion, eighty-two million, six hundred thirty-six thousand, five hundred seventy-three".