2661344111 has 2 divisors, whose sum is σ = 2661344112. Its totient is φ = 2661344110.

The previous prime is 2661344039. The next prime is 2661344113. The reversal of 2661344111 is 1114431662.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2661344111 - 2¹⁸ = 2661081967 is a prime.

Together with 2661344113, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2661344113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1330672055 + 1330672056.

It is an arithmetic number, because the mean of its divisors is an integer number (1330672056).

Almost surely, 2^2661344111 is an apocalyptic number.

2661344111 is a deficient number, since it is larger than the sum of its proper divisors (1).

2661344111 is an equidigital number, since it uses as much as digits as its factorization.

2661344111 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3456, while the sum is 29.

The square root of 2661344111 is about 51588.2167844557. The cubic root of 2661344111 is about 1385.7993206920.

Adding to 2661344111 its reverse (1114431662), we get a palindrome (3775775773).

The spelling of 2661344111 in words is "two billion, six hundred sixty-one million, three hundred forty-four thousand, one hundred eleven".