6568255661 has 8 divisors (see below), whose sum is σ = 7209331104. Its totient is φ = 5934507120.

The previous prime is 6568255657. The next prime is 6568255679. The reversal of 6568255661 is 1665528656.

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

It is a cyclic number.

It is not a de Polignac number, because 6568255661 - 2² = 6568255657 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6568255621) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 1829846 + ... + 1833431.

It is an arithmetic number, because the mean of its divisors is an integer number (901166388).

Almost surely, 2^6568255661 is an apocalyptic number.

It is an amenable number.

6568255661 is a deficient number, since it is larger than the sum of its proper divisors (641075443).

6568255661 is a wasteful number, since it uses less digits than its factorization.

6568255661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3663451.

The product of its digits is 2592000, while the sum is 50.

The square root of 6568255661 is about 81044.7756551895. The cubic root of 6568255661 is about 1872.7652817639.

The spelling of 6568255661 in words is "six billion, five hundred sixty-eight million, two hundred fifty-five thousand, six hundred sixty-one".