866786253802846 has 32 divisors (see below), whose sum is σ = 1445447631108096. Its totient is φ = 387126902988000.

The previous prime is 866786253802817. The next prime is 866786253802907. The reversal of 866786253802846 is 648208352687668.

It is a congruent 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 15 ways as a sum of consecutive naturals, for example, 18927120 + ... + 45736291.

It is an arithmetic number, because the mean of its divisors is an integer number (45170238472128).

Almost surely, 2^{866786253802846} is an apocalyptic number.

866786253802846 is a deficient number, since it is larger than the sum of its proper divisors (578661377305250).

866786253802846 is a wasteful number, since it uses less digits than its factorization.

866786253802846 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64680088.

The product of its (nonzero) digits is 8918138880, while the sum is 79.

The spelling of 866786253802846 in words is "eight hundred sixty-six trillion, seven hundred eighty-six billion, two hundred fifty-three million, eight hundred two thousand, eight hundred forty-six".