866800082636507 has 2 divisors, whose sum is σ = 866800082636508. Its totient is φ = 866800082636506.

The previous prime is 866800082636441. The next prime is 866800082636557. The reversal of 866800082636507 is 705636280008668.

866800082636507 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 is a cyclic number.

It is not a de Polignac number, because 866800082636507 - 2¹⁸ = 866800082374363 is a prime.

It is a super-2 number, since 2×866800082636507² (a number of 31 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (866800082636557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 433400041318253 + 433400041318254.

It is an arithmetic number, because the mean of its divisors is an integer number (433400041318254).

Almost surely, 2^{866800082636507} is an apocalyptic number.

866800082636507 is a deficient number, since it is larger than the sum of its proper divisors (1).

866800082636507 is an equidigital number, since it uses as much as digits as its factorization.

866800082636507 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 139345920, while the sum is 65.

The spelling of 866800082636507 in words is "eight hundred sixty-six trillion, eight hundred billion, eighty-two million, six hundred thirty-six thousand, five hundred seven".