866786276528216 has 64 divisors (see below), whose sum is σ = 1810702866170880. Its totient is φ = 385609184692480.

The previous prime is 866786276528209. The next prime is 866786276528243. The reversal of 866786276528216 is 612825672687668.

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, 1496706740 + ... + 1497285756.

It is an arithmetic number, because the mean of its divisors is an integer number (28292232283920).

Almost surely, 2^{866786276528216} is an apocalyptic number.

It is an amenable number.

866786276528216 is an abundant number, since it is smaller than the sum of its proper divisors (943916589642664).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

866786276528216 is a wasteful number, since it uses less digits than its factorization.

866786276528216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 941024 (or 941020 counting only the distinct ones).

The product of its digits is 7803371520, while the sum is 80.

The spelling of 866786276528216 in words is "eight hundred sixty-six trillion, seven hundred eighty-six billion, two hundred seventy-six million, five hundred twenty-eight thousand, two hundred sixteen".