866158424112331 has 16 divisors (see below), whose sum is σ = 1006547480988928. Its totient is φ = 729942668474400.

The previous prime is 866158424112269. The next prime is 866158424112349. The reversal of 866158424112331 is 133211424851668.

It is a cyclic number.

It is not a de Polignac number, because 866158424112331 - 2⁷ = 866158424112203 is a prime.

It is a super-2 number, since 2×866158424112331² (a number of 31 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (866158424142331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 426755205 + ... + 428780038.

It is an arithmetic number, because the mean of its divisors is an integer number (62909217561808).

Almost surely, 2^{866158424112331} is an apocalyptic number.

866158424112331 is a deficient number, since it is larger than the sum of its proper divisors (140389056876597).

866158424112331 is a wasteful number, since it uses less digits than its factorization.

866158424112331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 855537682.

The product of its digits is 6635520, while the sum is 55.

Adding to 866158424112331 its reverse (133211424851668), we get a palindrome (999369848963999).

The spelling of 866158424112331 in words is "eight hundred sixty-six trillion, one hundred fifty-eight billion, four hundred twenty-four million, one hundred twelve thousand, three hundred thirty-one".