866800082636558 has 64 divisors (see below), whose sum is σ = 1526273418129408. Its totient is φ = 361499811995520.

The previous prime is 866800082636557. The next prime is 866800082636573. The reversal of 866800082636558 is 855636280008668.

It is a junction number, because it is equal to n+sod(n) for n = 866800082636491 and 866800082636500.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (866800082636557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 75906560 + ... + 86576012.

It is an arithmetic number, because the mean of its divisors is an integer number (23848022158272).

Almost surely, 2^{866800082636558} is an apocalyptic number.

866800082636558 is a deficient number, since it is larger than the sum of its proper divisors (659473335492850).

866800082636558 is a wasteful number, since it uses less digits than its factorization.

866800082636558 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10670217.

The product of its (nonzero) digits is 796262400, while the sum is 71.

The spelling of 866800082636558 in words is "eight hundred sixty-six trillion, eight hundred billion, eighty-two million, six hundred thirty-six thousand, five hundred fifty-eight".