866786514037025 has 12 divisors (see below), whose sum is σ = 1074937959480684. Its totient is φ = 693350061504000.

The previous prime is 866786514037021. The next prime is 866786514037051. The reversal of 866786514037025 is 520730415687668.

It can be written as a sum of positive squares in 6 ways, for example, as 11772831496336 + 855013682540689 = 3431156^2 + 29240617^2 .

It is not a de Polignac number, because 866786514037025 - 2² = 866786514037021 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (866786514037021) 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 11 ways as a sum of consecutive naturals, for example, 1978519736 + ... + 1978957785.

It is an arithmetic number, because the mean of its divisors is an integer number (89578163290057).

Almost surely, 2^{866786514037025} is an apocalyptic number.

It is an amenable number.

866786514037025 is a deficient number, since it is larger than the sum of its proper divisors (208151445443659).

866786514037025 is a wasteful number, since it uses less digits than its factorization.

866786514037025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3957486292 (or 3957486287 counting only the distinct ones).

The product of its (nonzero) digits is 406425600, while the sum is 68.

The spelling of 866786514037025 in words is "eight hundred sixty-six trillion, seven hundred eighty-six billion, five hundred fourteen million, thirty-seven thousand, twenty-five".