866882868905 has 4 divisors (see below), whose sum is σ = 1040259442692.
Its totient is φ = 693506295120.
The previous prime is 866882868871. The next prime is 866882868919. The reversal of 866882868905 is 509868288668.
It is a semiprime because it is the product of two primes.
It can be written as a sum of positive squares in 2 ways, for example, as 645233053696 + 221649815209 = 803264^2 + 470797^2
It is a de Polignac number, because none of the positive numbers 2k-866882868905 is a prime.
It is a Duffinian number.
It is an unprimeable number.
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 3 ways as a sum of consecutive naturals, for example, 86688286886 + ... + 86688286895.
It is an arithmetic number, because the mean of its divisors is an integer number (260064860673).
Almost surely, 2866882868905 is an apocalyptic number.
It is an amenable number.
866882868905 is a deficient number, since it is larger than the sum of its proper divisors (173376573787).
866882868905 is a wasteful number, since it uses less digits than its factorization.
866882868905 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 173376573786.
The product of its (nonzero) digits is 637009920, while the sum is 74.
The spelling of 866882868905 in words is "eight hundred sixty-six billion, eight hundred eighty-two million, eight hundred sixty-eight thousand, nine hundred five".