866005524852 has 384 divisors, whose sum is σ = 2447137308672. Its totient is φ = 236033740800.

The previous prime is 866005524841. The next prime is 866005524859. The reversal of 866005524852 is 258425500668.

866005524852 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 866005524795 and 866005524804.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (866005524859) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 241696653 + ... + 241700235.

It is an arithmetic number, because the mean of its divisors is an integer number (6372753408).

Almost surely, 2^866005524852 is an apocalyptic number.

866005524852 is a gapful number since it is divisible by the number (82) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 866005524852, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1223568654336).

866005524852 is an abundant number, since it is smaller than the sum of its proper divisors (1581131783820).

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

866005524852 is a wasteful number, since it uses less digits than its factorization.

866005524852 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3751 (or 3749 counting only the distinct ones).

The product of its (nonzero) digits is 4608000, while the sum is 51.

The spelling of 866005524852 in words is "eight hundred sixty-six billion, five million, five hundred twenty-four thousand, eight hundred fifty-two".