866800082636728 has 8 divisors (see below), whose sum is σ = 1625250154943880. Its totient is φ = 433400041318360.

The previous prime is 866800082636639. The next prime is 866800082636729. The reversal of 866800082636728 is 827636280008668.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (866800082636729) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54175005164788 + ... + 54175005164803.

It is an arithmetic number, because the mean of its divisors is an integer number (203156269367985).

Almost surely, 2^{866800082636728} is an apocalyptic number.

It is an amenable number.

866800082636728 is a deficient number, since it is larger than the sum of its proper divisors (758450072307152).

866800082636728 is a wasteful number, since it uses less digits than its factorization.

866800082636728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108350010329597 (or 108350010329593 counting only the distinct ones).

The product of its (nonzero) digits is 445906944, while the sum is 70.

The spelling of 866800082636728 in words is "eight hundred sixty-six trillion, eight hundred billion, eighty-two million, six hundred thirty-six thousand, seven hundred twenty-eight".