6611297809 has 2 divisors, whose sum is σ = 6611297810. Its totient is φ = 6611297808.

The previous prime is 6611297731. The next prime is 6611297837. The reversal of 6611297809 is 9087921166.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6576723409 + 34574400 = 81097^2 + 5880^2 .

It is a cyclic number.

It is not a de Polignac number, because 6611297809 - 2⁷ = 6611297681 is a prime.

It is not a weakly prime, because it can be changed into another prime (6611297839) 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, 3305648904 + 3305648905.

It is an arithmetic number, because the mean of its divisors is an integer number (3305648905).

Almost surely, 2^6611297809 is an apocalyptic number.

It is an amenable number.

6611297809 is a deficient number, since it is larger than the sum of its proper divisors (1).

6611297809 is an equidigital number, since it uses as much as digits as its factorization.

6611297809 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 326592, while the sum is 49.

The square root of 6611297809 is about 81309.8875229821. The cubic root of 6611297809 is about 1876.8471571207.

The spelling of 6611297809 in words is "six billion, six hundred eleven million, two hundred ninety-seven thousand, eight hundred nine".