866132653405888 has 112 divisors (see below), whose sum is σ = 1893696733450368. Its totient is φ = 393025945171200.

The previous prime is 866132653405871. The next prime is 866132653405909. The reversal of 866132653405888 is 888504356231668.

It is a self number, because there is not a number n which added to its sum of digits gives 866132653405888.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 41342203 + ... + 58663813.

It is an arithmetic number, because the mean of its divisors is an integer number (16908006548664).

Almost surely, 2^{866132653405888} is an apocalyptic number.

866132653405888 is a gapful number since it is divisible by the number (88) 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 866132653405888, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (946848366725184).

866132653405888 is an abundant number, since it is smaller than the sum of its proper divisors (1027564080044480).

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

866132653405888 is a wasteful number, since it uses less digits than its factorization.

866132653405888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17322243 (or 17322211 counting only the distinct ones).

The product of its (nonzero) digits is 1592524800, while the sum is 73.

The spelling of 866132653405888 in words is "eight hundred sixty-six trillion, one hundred thirty-two billion, six hundred fifty-three million, four hundred five thousand, eight hundred eighty-eight".