866635112 has 64 divisors (see below), whose sum is σ = 1975259520. Its totient is φ = 347977728.

The previous prime is 866635109. The next prime is 866635139. The reversal of 866635112 is 211536668.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 219863 + ... + 223769.

It is an arithmetic number, because the mean of its divisors is an integer number (30863430).

Almost surely, 2^866635112 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 866635112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (987629760).

866635112 is an abundant number, since it is smaller than the sum of its proper divisors (1108624408).

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

866635112 is a wasteful number, since it uses less digits than its factorization.

866635112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4170 (or 4166 counting only the distinct ones).

The product of its digits is 51840, while the sum is 38.

The square root of 866635112 is about 29438.6669535154. Note that the first 3 decimals coincide. The cubic root of 866635112 is about 953.4079307638.

The spelling of 866635112 in words is "eight hundred sixty-six million, six hundred thirty-five thousand, one hundred twelve".