866800082636823 has 16 divisors (see below), whose sum is σ = 1171567611269120. Its totient is φ = 569949667648704.

The previous prime is 866800082636797. The next prime is 866800082636857. The reversal of 866800082636823 is 328636280008668.

It is not a de Polignac number, because 866800082636823 - 2⁶ = 866800082636759 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (866800082636923) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 122825898 + ... + 129691176.

It is an arithmetic number, because the mean of its divisors is an integer number (73222975704320).

Almost surely, 2^{866800082636823} is an apocalyptic number.

866800082636823 is a deficient number, since it is larger than the sum of its proper divisors (304767528632297).

866800082636823 is a wasteful number, since it uses less digits than its factorization.

866800082636823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7441878.

The product of its (nonzero) digits is 191102976, while the sum is 66.

The spelling of 866800082636823 in words is "eight hundred sixty-six trillion, eight hundred billion, eighty-two million, six hundred thirty-six thousand, eight hundred twenty-three".