866788526376800 has 72 divisors (see below), whose sum is σ = 2116265186968632. Its totient is φ = 346679740800000.

The previous prime is 866788526376797. The next prime is 866788526376827. The reversal of 866788526376800 is 8673625887668.

It is a happy number.

866788526376800 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (80).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 47952326 + ... + 63505925.

It is an arithmetic number, because the mean of its divisors is an integer number (29392572041231).

Almost surely, 2^{866788526376800} is an apocalyptic number.

866788526376800 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

866788526376800 is an abundant number, since it is smaller than the sum of its proper divisors (1249476660591832).

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

866788526376800 is a wasteful number, since it uses less digits than its factorization.

866788526376800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111467992 (or 111467979 counting only the distinct ones).

The product of its (nonzero) digits is 7803371520, while the sum is 80.

The spelling of 866788526376800 in words is "eight hundred sixty-six trillion, seven hundred eighty-eight billion, five hundred twenty-six million, three hundred seventy-six thousand, eight hundred".