866344443668 has 12 divisors (see below), whose sum is σ = 1653930301632. Its totient is φ = 393792928920.

The previous prime is 866344443623. The next prime is 866344443683.

866344443668 is nontrivially palindromic in base 10.

866344443668 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 866344443668.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9844823180 + ... + 9844823267.

It is an arithmetic number, because the mean of its divisors is an integer number (137827525136).

Almost surely, 2^866344443668 is an apocalyptic number.

It is an amenable number.

866344443668 is a deficient number, since it is larger than the sum of its proper divisors (787585857964).

866344443668 is a wasteful number, since it uses less digits than its factorization.

866344443668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19689646462 (or 19689646460 counting only the distinct ones).

The product of its digits is 191102976, while the sum is 62.

The spelling of 866344443668 in words is "eight hundred sixty-six billion, three hundred forty-four million, four hundred forty-three thousand, six hundred sixty-eight".