6605570561 has 2 divisors, whose sum is σ = 6605570562. Its totient is φ = 6605570560.

The previous prime is 6605570483. The next prime is 6605570563. The reversal of 6605570561 is 1650755066.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5755498225 + 850072336 = 75865^2 + 29156^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6605570561 is a prime.

Together with 6605570563, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (6605570563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3302785280 + 3302785281.

It is an arithmetic number, because the mean of its divisors is an integer number (3302785281).

Almost surely, 2^6605570561 is an apocalyptic number.

It is an amenable number.

6605570561 is a deficient number, since it is larger than the sum of its proper divisors (1).

6605570561 is an equidigital number, since it uses as much as digits as its factorization.

6605570561 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 189000, while the sum is 41.

The square root of 6605570561 is about 81274.6612481406. The cubic root of 6605570561 is about 1876.3050409397.

The spelling of 6605570561 in words is "six billion, six hundred five million, five hundred seventy thousand, five hundred sixty-one".