866027814912 has 480 divisors, whose sum is σ = 2831477732160. Its totient is φ = 259900047360.

The previous prime is 866027814889. The next prime is 866027814913. The reversal of 866027814912 is 219418720668.

It is a happy number.

866027814912 is a `hidden beast` number, since 8 + 6 + 602 + 7 + 8 + 14 + 9 + 12 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (866027814913) 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, 235780308 + ... + 235783980.

It is an arithmetic number, because the mean of its divisors is an integer number (5898911942).

Almost surely, 2^866027814912 is an apocalyptic number.

866027814912 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 866027814912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1415738866080).

866027814912 is an abundant number, since it is smaller than the sum of its proper divisors (1965449917248).

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

866027814912 is a wasteful number, since it uses less digits than its factorization.

866027814912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3764 (or 3732 counting only the distinct ones).

The product of its (nonzero) digits is 2322432, while the sum is 54.

The spelling of 866027814912 in words is "eight hundred sixty-six billion, twenty-seven million, eight hundred fourteen thousand, nine hundred twelve".