666113311 has 2 divisors, whose sum is σ = 666113312. Its totient is φ = 666113310.

The previous prime is 666113309. The next prime is 666113359. The reversal of 666113311 is 113311666.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 666113311 - 2¹ = 666113309 is a prime.

Together with 666113309, it forms a pair of twin primes.

It is a zygodrome in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 666113311.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (666113011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 333056655 + 333056656.

It is an arithmetic number, because the mean of its divisors is an integer number (333056656).

Almost surely, 2^666113311 is an apocalyptic number.

666113311 is a deficient number, since it is larger than the sum of its proper divisors (1).

666113311 is an equidigital number, since it uses as much as digits as its factorization.

666113311 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1944, while the sum is 28.

The square root of 666113311 is about 25809.1710637905. The cubic root of 666113311 is about 873.3386974821.

Adding to 666113311 its reverse (113311666), we get a palindrome (779424977).

The spelling of 666113311 in words is "six hundred sixty-six million, one hundred thirteen thousand, three hundred eleven".