866504405668 has 12 divisors (see below), whose sum is σ = 1654235683632. Its totient is φ = 393865638920.

The previous prime is 866504405633. The next prime is 866504405719.

866504405668 is nontrivially palindromic in base 10.

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, 9846640930 + ... + 9846641017.

It is an arithmetic number, because the mean of its divisors is an integer number (137852973636).

Almost surely, 2^866504405668 is an apocalyptic number.

It is an amenable number.

866504405668 is a deficient number, since it is larger than the sum of its proper divisors (787731277964).

866504405668 is a wasteful number, since it uses less digits than its factorization.

866504405668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19693281962 (or 19693281960 counting only the distinct ones).

The product of its (nonzero) digits is 33177600, while the sum is 58.

The spelling of 866504405668 in words is "eight hundred sixty-six billion, five hundred four million, four hundred five thousand, six hundred sixty-eight".