6411060666809 has 2 divisors, whose sum is σ = 6411060666810. Its totient is φ = 6411060666808.

The previous prime is 6411060666779. The next prime is 6411060666869. The reversal of 6411060666809 is 9086660601146.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4926610842409 + 1484449824400 = 2219597^2 + 1218380^2 .

It is a cyclic number.

It is not a de Polignac number, because 6411060666809 - 2⁴⁰ = 5311549039033 is a prime.

It is a super-2 number, since 2×6411060666809² (a number of 26 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (6411060666869) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3205530333404 + 3205530333405.

It is an arithmetic number, because the mean of its divisors is an integer number (3205530333405).

Almost surely, 2^{6411060666809} is an apocalyptic number.

It is an amenable number.

6411060666809 is a deficient number, since it is larger than the sum of its proper divisors (1).

6411060666809 is an equidigital number, since it uses as much as digits as its factorization.

6411060666809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2239488, while the sum is 53.

The spelling of 6411060666809 in words is "six trillion, four hundred eleven billion, sixty million, six hundred sixty-six thousand, eight hundred nine".