866450861796 has 96 divisors (see below), whose sum is σ = 2269507363200. Its totient is φ = 255442037760.

The previous prime is 866450861737. The next prime is 866450861797. The reversal of 866450861796 is 697168054668.

It is not an unprimeable number, because it can be changed into a prime (866450861797) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 138361 + ... + 1323648.

It is an arithmetic number, because the mean of its divisors is an integer number (23640701700).

Almost surely, 2^866450861796 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 866450861796, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1134753681600).

866450861796 is an abundant number, since it is smaller than the sum of its proper divisors (1403056501404).

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

866450861796 is a wasteful number, since it uses less digits than its factorization.

866450861796 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1462189 (or 1462187 counting only the distinct ones).

The product of its (nonzero) digits is 104509440, while the sum is 66.

The spelling of 866450861796 in words is "eight hundred sixty-six billion, four hundred fifty million, eight hundred sixty-one thousand, seven hundred ninety-six".