6665365871 has 2 divisors, whose sum is σ = 6665365872. Its totient is φ = 6665365870.

The previous prime is 6665365853. The next prime is 6665365897. The reversal of 6665365871 is 1785635666.

6665365871 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6665365871 - 2¹⁰ = 6665364847 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6665065871) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3332682935 + 3332682936.

It is an arithmetic number, because the mean of its divisors is an integer number (3332682936).

Almost surely, 2^6665365871 is an apocalyptic number.

6665365871 is a deficient number, since it is larger than the sum of its proper divisors (1).

6665365871 is an equidigital number, since it uses as much as digits as its factorization.

6665365871 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5443200, while the sum is 53.

The square root of 6665365871 is about 81641.6919900611. The cubic root of 6665365871 is about 1881.9496402408.

The spelling of 6665365871 in words is "six billion, six hundred sixty-five million, three hundred sixty-five thousand, eight hundred seventy-one".