8665607409 has 4 divisors (see below), whose sum is σ = 11554143216. Its totient is φ = 5777071604.

The previous prime is 8665607399. The next prime is 8665607429. The reversal of 8665607409 is 9047065668.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 8665607409 - 2²⁷ = 8531389681 is a prime.

It is not an unprimeable number, because it can be changed into a prime (8665607429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1444267899 + ... + 1444267904.

It is an arithmetic number, because the mean of its divisors is an integer number (2888535804).

Almost surely, 2^8665607409 is an apocalyptic number.

It is an amenable number.

8665607409 is a deficient number, since it is larger than the sum of its proper divisors (2888535807).

8665607409 is a wasteful number, since it uses less digits than its factorization.

8665607409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2888535806.

The product of its (nonzero) digits is 2177280, while the sum is 51.

The square root of 8665607409 is about 93089.2443250024. The cubic root of 8665607409 is about 2053.9963612232.

The spelling of 8665607409 in words is "eight billion, six hundred sixty-five million, six hundred seven thousand, four hundred nine".