866982112500 has 648 divisors, whose sum is σ = 3106689471648. Its totient is φ = 187593840000.

The previous prime is 866982112453. The next prime is 866982112517. The reversal of 866982112500 is 5211289668.

866982112500 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 866982112500.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 215 ways as a sum of consecutive naturals, for example, 663336847 + ... + 663338153.

It is an arithmetic number, because the mean of its divisors is an integer number (4794273876).

Almost surely, 2^866982112500 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 866982112500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1553344735824).

866982112500 is an abundant number, since it is smaller than the sum of its proper divisors (2239707359148).

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

866982112500 is a wasteful number, since it uses less digits than its factorization.

866982112500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1391 (or 1343 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 48.

The spelling of 866982112500 in words is "eight hundred sixty-six billion, nine hundred eighty-two million, one hundred twelve thousand, five hundred".