6611611109 has 2 divisors, whose sum is σ = 6611611110. Its totient is φ = 6611611108.

The previous prime is 6611611057. The next prime is 6611611159. The reversal of 6611611109 is 9011161166.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4644422500 + 1967188609 = 68150^2 + 44353^2 .

It is a cyclic number.

It is not a de Polignac number, because 6611611109 - 2²⁰ = 6610562533 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6611611159) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3305805554 + 3305805555.

It is an arithmetic number, because the mean of its divisors is an integer number (3305805555).

Almost surely, 2^6611611109 is an apocalyptic number.

It is an amenable number.

6611611109 is a deficient number, since it is larger than the sum of its proper divisors (1).

6611611109 is an equidigital number, since it uses as much as digits as its factorization.

6611611109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1944, while the sum is 32.

The square root of 6611611109 is about 81311.8140801200. The cubic root of 6611611109 is about 1876.8768036915.

The spelling of 6611611109 in words is "six billion, six hundred eleven million, six hundred eleven thousand, one hundred nine".