866800082636729 has 2 divisors, whose sum is σ = 866800082636730. Its totient is φ = 866800082636728.

The previous prime is 866800082636639. The next prime is 866800082636759. The reversal of 866800082636729 is 927636280008668.

866800082636729 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 853418240702329 + 13381841934400 = 29213323^2 + 3658120^2 .

It is a cyclic number.

It is not a de Polignac number, because 866800082636729 - 2³⁶ = 866731363159993 is a prime.

It is not a weakly prime, because it can be changed into another prime (866800082636759) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 433400041318364 + 433400041318365.

It is an arithmetic number, because the mean of its divisors is an integer number (433400041318365).

Almost surely, 2^{866800082636729} is an apocalyptic number.

It is an amenable number.

866800082636729 is a deficient number, since it is larger than the sum of its proper divisors (1).

866800082636729 is an equidigital number, since it uses as much as digits as its factorization.

866800082636729 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 501645312, while the sum is 71.

The spelling of 866800082636729 in words is "eight hundred sixty-six trillion, eight hundred billion, eighty-two million, six hundred thirty-six thousand, seven hundred twenty-nine".