6665005666 has 8 divisors (see below), whose sum is σ = 10906372944. Its totient is φ = 3029548020.

The previous prime is 6665005651. The next prime is 6665005691.

6665005666 is nontrivially palindromic in base 10.

It is a sphenic number, since it is the product of 3 distinct primes.

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, 151477380 + ... + 151477423.

It is an arithmetic number, because the mean of its divisors is an integer number (1363296618).

Almost surely, 2^6665005666 is an apocalyptic number.

6665005666 is a deficient number, since it is larger than the sum of its proper divisors (4241367278).

6665005666 is a wasteful number, since it uses less digits than its factorization.

6665005666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 302954816.

The product of its (nonzero) digits is 1166400, while the sum is 46.

The square root of 6665005666 is about 81639.4859488961. The cubic root of 6665005666 is about 1881.9157386319.

The spelling of 6665005666 in words is "six billion, six hundred sixty-five million, five thousand, six hundred sixty-six".