866788526376775 has 12 divisors (see below), whose sum is σ = 1095097353325992. Its totient is φ = 680347220702240.

The previous prime is 866788526376727. The next prime is 866788526376797. The reversal of 866788526376775 is 577673625887668.

It is not a de Polignac number, because 866788526376775 - 2³⁵ = 866754166638407 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 866788526376775.

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, 327090008629 + ... + 327090011278.

It is an arithmetic number, because the mean of its divisors is an integer number (91258112777166).

Almost surely, 2^{866788526376775} is an apocalyptic number.

866788526376775 is a deficient number, since it is larger than the sum of its proper divisors (228308826949217).

866788526376775 is a wasteful number, since it uses less digits than its factorization.

866788526376775 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 654180019970 (or 654180019965 counting only the distinct ones).

The product of its digits is 238978252800, while the sum is 91.

The spelling of 866788526376775 in words is "eight hundred sixty-six trillion, seven hundred eighty-eight billion, five hundred twenty-six million, three hundred seventy-six thousand, seven hundred seventy-five".