866788526244728 has 16 divisors (see below), whose sum is σ = 1638025561409280. Its totient is φ = 429981709868928.

The previous prime is 866788526244649. The next prime is 866788526244743. The reversal of 866788526244728 is 827442625887668.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 426569155601 + ... + 426569157632.

It is an arithmetic number, because the mean of its divisors is an integer number (102376597588080).

Almost surely, 2^{866788526244728} is an apocalyptic number.

It is an amenable number.

866788526244728 is a deficient number, since it is larger than the sum of its proper divisors (771237035164552).

866788526244728 is a wasteful number, since it uses less digits than its factorization.

866788526244728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 853138313366 (or 853138313362 counting only the distinct ones).

The product of its digits is 27745320960, while the sum is 83.

The spelling of 866788526244728 in words is "eight hundred sixty-six trillion, seven hundred eighty-eight billion, five hundred twenty-six million, two hundred forty-four thousand, seven hundred twenty-eight".