6665444311 has 2 divisors, whose sum is σ = 6665444312. Its totient is φ = 6665444310.

The previous prime is 6665444299. The next prime is 6665444351. The reversal of 6665444311 is 1134445666.

It is a happy number.

It is an a-pointer prime, because the next prime (6665444351) can be obtained adding 6665444311 to its sum of digits (40).

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6665444311 is a prime.

It is a nialpdrome in base 10.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6665444351) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3332722155 + 3332722156.

It is an arithmetic number, because the mean of its divisors is an integer number (3332722156).

Almost surely, 2^6665444311 is an apocalyptic number.

6665444311 is a deficient number, since it is larger than the sum of its proper divisors (1).

6665444311 is an equidigital number, since it uses as much as digits as its factorization.

6665444311 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 207360, while the sum is 40.

The square root of 6665444311 is about 81642.1723804554. The cubic root of 6665444311 is about 1881.9570226588.

Adding to 6665444311 its reverse (1134445666), we get a palindrome (7799889977).

The spelling of 6665444311 in words is "six billion, six hundred sixty-five million, four hundred forty-four thousand, three hundred eleven".