866827376627424 has 192 divisors, whose sum is σ = 2379281259801600. Its totient is φ = 275806233280512.

The previous prime is 866827376627423. The next prime is 866827376627453. The reversal of 866827376627424 is 424726673728668.

It is a self number, because there is not a number n which added to its sum of digits gives 866827376627424.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (866827376627423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11545499517 + ... + 11545574595.

It is an arithmetic number, because the mean of its divisors is an integer number (12392089894800).

Almost surely, 2^{866827376627424} 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 866827376627424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1189640629900800).

866827376627424 is an abundant number, since it is smaller than the sum of its proper divisors (1512453883174176).

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

866827376627424 is a wasteful number, since it uses less digits than its factorization.

866827376627424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85897 (or 85889 counting only the distinct ones).

The product of its digits is 10924720128, while the sum is 78.

The spelling of 866827376627424 in words is "eight hundred sixty-six trillion, eight hundred twenty-seven billion, three hundred seventy-six million, six hundred twenty-seven thousand, four hundred twenty-four".