6665341213 has 2 divisors, whose sum is σ = 6665341214. Its totient is φ = 6665341212.

The previous prime is 6665341141. The next prime is 6665341247. The reversal of 6665341213 is 3121435666.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5731549849 + 933791364 = 75707^2 + 30558^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6665341213 is a prime.

It is a super-2 number, since 2×6665341213² = 88853546971432622738, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6665345213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3332670606 + 3332670607.

It is an arithmetic number, because the mean of its divisors is an integer number (3332670607).

Almost surely, 2^6665341213 is an apocalyptic number.

It is an amenable number.

6665341213 is a deficient number, since it is larger than the sum of its proper divisors (1).

6665341213 is an equidigital number, since it uses as much as digits as its factorization.

6665341213 is an evil number, because the sum of its binary digits is even.

The product of its digits is 77760, while the sum is 37.

The square root of 6665341213 is about 81641.5409763926. The cubic root of 6665341213 is about 1881.9473195295.

Adding to 6665341213 its reverse (3121435666), we get a palindrome (9786776879).

The spelling of 6665341213 in words is "six billion, six hundred sixty-five million, three hundred forty-one thousand, two hundred thirteen".