8665665668 has 24 divisors (see below), whose sum is σ = 16597457184. Its totient is φ = 3926102400.

The previous prime is 8665665661. The next prime is 8665665683.

8665665668 is nontrivially palindromic in base 10.

It is a super-2 number, since 2×8665665668² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 8665665668.

It is not an unprimeable number, because it can be changed into a prime (8665665661) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 307253 + ... + 334268.

It is an arithmetic number, because the mean of its divisors is an integer number (691560716).

Almost surely, 2^8665665668 is an apocalyptic number.

It is an amenable number.

8665665668 is a deficient number, since it is larger than the sum of its proper divisors (7931791516).

8665665668 is a wasteful number, since it uses less digits than its factorization.

8665665668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 641843 (or 641841 counting only the distinct ones).

The product of its digits is 74649600, while the sum is 62.

The square root of 8665665668 is about 93089.5572446233. The cubic root of 8665665668 is about 2054.0009642283. Note that the first 3 decimals are identical.

The spelling of 8665665668 in words is "eight billion, six hundred sixty-five million, six hundred sixty-five thousand, six hundred sixty-eight".