866802186633538 has 8 divisors (see below), whose sum is σ = 1300685015149200. Its totient is φ = 433240514917140.

The previous prime is 866802186633511. The next prime is 866802186633701. The reversal of 866802186633538 is 835336681208668.

It is a sphenic number, since it is the product of 3 distinct primes.

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, 80289193068 + ... + 80289203863.

It is an arithmetic number, because the mean of its divisors is an integer number (162585626893650).

Almost surely, 2^{866802186633538} is an apocalyptic number.

866802186633538 is a deficient number, since it is larger than the sum of its proper divisors (433882828515662).

866802186633538 is a wasteful number, since it uses less digits than its factorization.

866802186633538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160578399632.

The product of its (nonzero) digits is 1433272320, while the sum is 73.

The spelling of 866802186633538 in words is "eight hundred sixty-six trillion, eight hundred two billion, one hundred eighty-six million, six hundred thirty-three thousand, five hundred thirty-eight".