866827820573365 has 16 divisors (see below), whose sum is σ = 1188842649524352. Its totient is φ = 594371114881344.

The previous prime is 866827820573329. The next prime is 866827820573443. The reversal of 866827820573365 is 563375028728668.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-866827820573365 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 866827820573291 and 866827820573300.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 522179059 + ... + 523836448.

It is an arithmetic number, because the mean of its divisors is an integer number (74302665595272).

Almost surely, 2^{866827820573365} is an apocalyptic number.

It is an amenable number.

866827820573365 is a deficient number, since it is larger than the sum of its proper divisors (322014828950987).

866827820573365 is a wasteful number, since it uses less digits than its factorization.

866827820573365 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1046039196.

The product of its (nonzero) digits is 4877107200, while the sum is 76.

The spelling of 866827820573365 in words is "eight hundred sixty-six trillion, eight hundred twenty-seven billion, eight hundred twenty million, five hundred seventy-three thousand, three hundred sixty-five".