866828808064 has 32 divisors (see below), whose sum is σ = 1756154777400. Its totient is φ = 426068393472.

The previous prime is 866828808047. The next prime is 866828808071. The reversal of 866828808064 is 460808828668.

It is a tau number, because it is divible by the number of its divisors (32).

It is a Harshad number since it is a multiple of its sum of digits (64).

It is a junction number, because it is equal to n+sod(n) for n = 866828807987 and 866828808005.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 57383127 + ... + 57398230.

Almost surely, 2^866828808064 is an apocalyptic number.

It is an amenable number.

866828808064 is an abundant number, since it is smaller than the sum of its proper divisors (889325969336).

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

866828808064 is a wasteful number, since it uses less digits than its factorization.

866828808064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114781430 (or 114781418 counting only the distinct ones).

The product of its (nonzero) digits is 56623104, while the sum is 64.

The spelling of 866828808064 in words is "eight hundred sixty-six billion, eight hundred twenty-eight million, eight hundred eight thousand, sixty-four".