866788526375331 has 16 divisors (see below), whose sum is σ = 1356518465988864. Its totient is φ = 481921033968864.

The previous prime is 866788526375287. The next prime is 866788526375377. The reversal of 866788526375331 is 133573625887668.

866788526375331 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 866788526375331 - 2⁹ = 866788526374819 is a prime.

It is a super-2 number, since 2×866788526375331² (a number of 31 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (866788526371331) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 557778973725 + ... + 557778975278.

It is an arithmetic number, because the mean of its divisors is an integer number (84782404124304).

Almost surely, 2^{866788526375331} is an apocalyptic number.

866788526375331 is a deficient number, since it is larger than the sum of its proper divisors (489729939613533).

866788526375331 is a wasteful number, since it uses less digits than its factorization.

866788526375331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1115557949050.

The product of its digits is 7315660800, while the sum is 78.

The spelling of 866788526375331 in words is "eight hundred sixty-six trillion, seven hundred eighty-eight billion, five hundred twenty-six million, three hundred seventy-five thousand, three hundred thirty-one".