866112249799 has 4 divisors (see below), whose sum is σ = 871298550864. Its totient is φ = 860925948736.

The previous prime is 866112249781. The next prime is 866112249803. The reversal of 866112249799 is 997942211668.

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

It is a cyclic number.

It is not a de Polignac number, because 866112249799 - 2¹¹ = 866112247751 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 866112249799.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (866112249599) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2593150282 + ... + 2593150615.

It is an arithmetic number, because the mean of its divisors is an integer number (217824637716).

Almost surely, 2^866112249799 is an apocalyptic number.

866112249799 is a deficient number, since it is larger than the sum of its proper divisors (5186301065).

866112249799 is a wasteful number, since it uses less digits than its factorization.

866112249799 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5186301064.

The product of its digits is 23514624, while the sum is 64.

The spelling of 866112249799 in words is "eight hundred sixty-six billion, one hundred twelve million, two hundred forty-nine thousand, seven hundred ninety-nine".