866841241747345 has 4 divisors (see below), whose sum is σ = 1040209490096820. Its totient is φ = 693472993397872.

The previous prime is 866841241747289. The next prime is 866841241747363. The reversal of 866841241747345 is 543747142148668.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 462931413937281 + 403909827810064 = 21515841^2 + 20097508^2 .

It is a cyclic number.

It is not a de Polignac number, because 866841241747345 - 2¹⁵ = 866841241714577 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 86684124174730 + ... + 86684124174739.

It is an arithmetic number, because the mean of its divisors is an integer number (260052372524205).

Almost surely, 2^{866841241747345} is an apocalyptic number.

It is an amenable number.

866841241747345 is a deficient number, since it is larger than the sum of its proper divisors (173368248349475).

866841241747345 is a wasteful number, since it uses less digits than its factorization.

866841241747345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173368248349474.

The product of its digits is 867041280, while the sum is 70.

The spelling of 866841241747345 in words is "eight hundred sixty-six trillion, eight hundred forty-one billion, two hundred forty-one million, seven hundred forty-seven thousand, three hundred forty-five".