6665533271 has 2 divisors, whose sum is σ = 6665533272. Its totient is φ = 6665533270.

The previous prime is 6665533249. The next prime is 6665533289. The reversal of 6665533271 is 1723355666.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6665533271 - 2¹⁴ = 6665516887 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6665533211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3332766635 + 3332766636.

It is an arithmetic number, because the mean of its divisors is an integer number (3332766636).

Almost surely, 2^6665533271 is an apocalyptic number.

6665533271 is a deficient number, since it is larger than the sum of its proper divisors (1).

6665533271 is an equidigital number, since it uses as much as digits as its factorization.

6665533271 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 680400, while the sum is 44.

The square root of 6665533271 is about 81642.7171951057. The cubic root of 6665533271 is about 1881.9653951015.

The spelling of 6665533271 in words is "six billion, six hundred sixty-five million, five hundred thirty-three thousand, two hundred seventy-one".