6555066665 has 16 divisors (see below), whose sum is σ = 9018542208. Its totient is φ = 4480534656.

The previous prime is 6555066647. The next prime is 6555066689. The reversal of 6555066665 is 5666605556.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6555066665 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 288227 + ... + 310136.

It is an arithmetic number, because the mean of its divisors is an integer number (563658888).

Almost surely, 2^6555066665 is an apocalyptic number.

It is an amenable number.

6555066665 is a deficient number, since it is larger than the sum of its proper divisors (2463475543).

6555066665 is a wasteful number, since it uses less digits than its factorization.

6555066665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 598688.

The product of its (nonzero) digits is 4860000, while the sum is 50.

The square root of 6555066665 is about 80963.3661911361. The cubic root of 6555066665 is about 1871.5109434262.

The spelling of 6555066665 in words is "six billion, five hundred fifty-five million, sixty-six thousand, six hundred sixty-five".