8665381799 has 4 divisors (see below), whose sum is σ = 8671322520. Its totient is φ = 8659441080.

The previous prime is 8665381789. The next prime is 8665381847. The reversal of 8665381799 is 9971835668.

It is a happy number.

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 8665381799 - 2²⁸ = 8396946343 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8665381789) 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, 2968172 + ... + 2971089.

It is an arithmetic number, because the mean of its divisors is an integer number (2167830630).

Almost surely, 2^8665381799 is an apocalyptic number.

8665381799 is a deficient number, since it is larger than the sum of its proper divisors (5940721).

8665381799 is a wasteful number, since it uses less digits than its factorization.

8665381799 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5940720.

The product of its digits is 19595520, while the sum is 62.

The square root of 8665381799 is about 93088.0325229833. The cubic root of 8665381799 is about 2053.9785357314.

The spelling of 8665381799 in words is "eight billion, six hundred sixty-five million, three hundred eighty-one thousand, seven hundred ninety-nine".