6611444909 has 2 divisors, whose sum is σ = 6611444910. Its totient is φ = 6611444908.

The previous prime is 6611444899. The next prime is 6611444933. The reversal of 6611444909 is 9094441166.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6572344900 + 39100009 = 81070^2 + 6253^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6611444909 is a prime.

It is a super-2 number, since 2×6611444909² = 87422407569484036562, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 6611444909.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6611444999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3305722454 + 3305722455.

It is an arithmetic number, because the mean of its divisors is an integer number (3305722455).

Almost surely, 2^6611444909 is an apocalyptic number.

It is an amenable number.

6611444909 is a deficient number, since it is larger than the sum of its proper divisors (1).

6611444909 is an equidigital number, since it uses as much as digits as its factorization.

6611444909 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 186624, while the sum is 44.

The square root of 6611444909 is about 81310.7920819863. The cubic root of 6611444909 is about 1876.8610768369.

The spelling of 6611444909 in words is "six billion, six hundred eleven million, four hundred forty-four thousand, nine hundred nine".