866802655166518 has 32 divisors (see below), whose sum is σ = 1517567870131200. Its totient is φ = 363581784385344.

The previous prime is 866802655166429. The next prime is 866802655166519. The reversal of 866802655166518 is 815661556208668.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (866802655166519) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 239617693 + ... + 243208231.

It is an arithmetic number, because the mean of its divisors is an integer number (47423995941600).

Almost surely, 2^{866802655166518} is an apocalyptic number.

866802655166518 is a deficient number, since it is larger than the sum of its proper divisors (650765214964682).

866802655166518 is a wasteful number, since it uses less digits than its factorization.

866802655166518 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3957484.

The product of its (nonzero) digits is 995328000, while the sum is 73.

The spelling of 866802655166518 in words is "eight hundred sixty-six trillion, eight hundred two billion, six hundred fifty-five million, one hundred sixty-six thousand, five hundred eighteen".