866786255830736 has 10 divisors (see below), whose sum is σ = 1679398370672082. Its totient is φ = 433393127915360.

The previous prime is 866786255830723. The next prime is 866786255830751. The reversal of 866786255830736 is 637038552687668.

It can be written as a sum of positive squares in only one way, i.e., 716736985539136 + 150049270291600 = 26771944^2 + 12249460^2 .

It is a super-2 number, since 2×866786255830736² (a number of 31 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27087070494695 + ... + 27087070494726.

Almost surely, 2^{866786255830736} is an apocalyptic number.

It is an amenable number.

866786255830736 is a deficient number, since it is larger than the sum of its proper divisors (812612114841346).

866786255830736 is a wasteful number, since it uses less digits than its factorization.

866786255830736 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54174140989429 (or 54174140989423 counting only the distinct ones).

The product of its (nonzero) digits is 14631321600, while the sum is 80.

The spelling of 866786255830736 in words is "eight hundred sixty-six trillion, seven hundred eighty-six billion, two hundred fifty-five million, eight hundred thirty thousand, seven hundred thirty-six".