6605665658 has 8 divisors (see below), whose sum is σ = 9913451328. Its totient is φ = 3301181884.

The previous prime is 6605665631. The next prime is 6605665669. The reversal of 6605665658 is 8565665066.

It is a happy number.

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

It is a Curzon number.

It is an unprimeable number.

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, 820466 + ... + 828477.

It is an arithmetic number, because the mean of its divisors is an integer number (1239181416).

Almost surely, 2^6605665658 is an apocalyptic number.

6605665658 is a deficient number, since it is larger than the sum of its proper divisors (3307785670).

6605665658 is a wasteful number, since it uses less digits than its factorization.

6605665658 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1650948.

The product of its (nonzero) digits is 7776000, while the sum is 53.

The square root of 6605665658 is about 81275.2462807711. The cubic root of 6605665658 is about 1876.3140449625.

The spelling of 6605665658 in words is "six billion, six hundred five million, six hundred sixty-five thousand, six hundred fifty-eight".