6665533211 has 2 divisors, whose sum is σ = 6665533212. Its totient is φ = 6665533210.

The previous prime is 6665533177. The next prime is 6665533249. The reversal of 6665533211 is 1123355666.

It is an a-pointer prime, because the next prime (6665533249) can be obtained adding 6665533211 to its sum of digits (38).

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6665533211 is a prime.

It is a Sophie Germain prime.

It is a nialpdrome in base 10.

It is not a weakly prime, because it can be changed into another prime (6665533271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3332766605 + 3332766606.

It is an arithmetic number, because the mean of its divisors is an integer number (3332766606).

Almost surely, 2^6665533211 is an apocalyptic number.

6665533211 is a deficient number, since it is larger than the sum of its proper divisors (1).

6665533211 is an equidigital number, since it uses as much as digits as its factorization.

6665533211 is an evil number, because the sum of its binary digits is even.

The product of its digits is 97200, while the sum is 38.

The square root of 6665533211 is about 81642.7168276510. The cubic root of 6665533211 is about 1881.9653894547.

Adding to 6665533211 its reverse (1123355666), we get a palindrome (7788888877).

The spelling of 6665533211 in words is "six billion, six hundred sixty-five million, five hundred thirty-three thousand, two hundred eleven".