866786484827034 has 320 divisors, whose sum is σ = 2106402542576640. Its totient is φ = 265478324567040.

The previous prime is 866786484826987. The next prime is 866786484827089. The reversal of 866786484827034 is 430728484687668.

866786484827034 is a `hidden beast` number, since 8 + 6 + 6 + 7 + 8 + 64 + 8 + 482 + 70 + 3 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (81).

It is an unprimeable number.

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 159 ways as a sum of consecutive naturals, for example, 46800189694 + ... + 46800208214.

It is an arithmetic number, because the mean of its divisors is an integer number (6582507945552).

Almost surely, 2^{866786484827034} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 866786484827034, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1053201271288320).

866786484827034 is an abundant number, since it is smaller than the sum of its proper divisors (1239616057749606).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

866786484827034 is a wasteful number, since it uses less digits than its factorization.

866786484827034 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19875 (or 19866 counting only the distinct ones).

The product of its (nonzero) digits is 16647192576, while the sum is 81.

The spelling of 866786484827034 in words is "eight hundred sixty-six trillion, seven hundred eighty-six billion, four hundred eighty-four million, eight hundred twenty-seven thousand, thirty-four".