866105660008316 has 192 divisors, whose sum is σ = 1909566464053248. Its totient is φ = 334598003131392.

The previous prime is 866105660008313. The next prime is 866105660008361. The reversal of 866105660008316 is 613800066501668.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (866105660008313) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 3545959691 + ... + 3546203933.

It is an arithmetic number, because the mean of its divisors is an integer number (9945658666944).

Almost surely, 2^{866105660008316} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 866105660008316, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (954783232026624).

866105660008316 is an abundant number, since it is smaller than the sum of its proper divisors (1043460804044932).

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

866105660008316 is a wasteful number, since it uses less digits than its factorization.

866105660008316 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 245180 (or 245178 counting only the distinct ones).

The product of its (nonzero) digits is 7464960, while the sum is 56.

The spelling of 866105660008316 in words is "eight hundred sixty-six trillion, one hundred five billion, six hundred sixty million, eight thousand, three hundred sixteen".