268665611 has 2 divisors, whose sum is σ = 268665612. Its totient is φ = 268665610.

The previous prime is 268665601. The next prime is 268665629. The reversal of 268665611 is 116566862.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-268665611 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (268665601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 134332805 + 134332806.

It is an arithmetic number, because the mean of its divisors is an integer number (134332806).

Almost surely, 2^268665611 is an apocalyptic number.

268665611 is a deficient number, since it is larger than the sum of its proper divisors (1).

268665611 is an equidigital number, since it uses as much as digits as its factorization.

268665611 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 103680, while the sum is 41.

The square root of 268665611 is about 16391.0222683029. The cubic root of 268665611 is about 645.2638873745.

The spelling of 268665611 in words is "two hundred sixty-eight million, six hundred sixty-five thousand, six hundred eleven".