866786486563228 has 192 divisors, whose sum is σ = 1908848040422400. Its totient is φ = 334563236904960.

The previous prime is 866786486563199. The next prime is 866786486563237. The reversal of 866786486563228 is 822365684687668.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 68267024176 + ... + 68267036872.

It is an arithmetic number, because the mean of its divisors is an integer number (9941916877200).

Almost surely, 2^{866786486563228} 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 866786486563228, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (954424020211200).

866786486563228 is an abundant number, since it is smaller than the sum of its proper divisors (1042061553859172).

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

866786486563228 is a wasteful number, since it uses less digits than its factorization.

866786486563228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16140 (or 16138 counting only the distinct ones).

The product of its digits is 53508833280, while the sum is 85.

The spelling of 866786486563228 in words is "eight hundred sixty-six trillion, seven hundred eighty-six billion, four hundred eighty-six million, five hundred sixty-three thousand, two hundred twenty-eight".