866443585653284 has 6 divisors (see below), whose sum is σ = 1516276274893254. Its totient is φ = 433221792826640.

The previous prime is 866443585653271. The next prime is 866443585653293. The reversal of 866443585653284 is 482356585344668.

It can be written as a sum of positive squares in only one way, i.e., 668690466902500 + 197753118750784 = 25859050^2 + 14062472^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108305448206657 + ... + 108305448206664.

It is an arithmetic number, because the mean of its divisors is an integer number (252712712482209).

Almost surely, 2^{866443585653284} is an apocalyptic number.

It is an amenable number.

866443585653284 is a deficient number, since it is larger than the sum of its proper divisors (649832689239970).

866443585653284 is a wasteful number, since it uses less digits than its factorization.

866443585653284 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 216610896413325 (or 216610896413323 counting only the distinct ones).

The product of its digits is 15925248000, while the sum is 77.

The spelling of 866443585653284 in words is "eight hundred sixty-six trillion, four hundred forty-three billion, five hundred eighty-five million, six hundred fifty-three thousand, two hundred eighty-four".