6664811 has 2 divisors, whose sum is σ = 6664812. Its totient is φ = 6664810.

The previous prime is 6664789. The next prime is 6664831. The reversal of 6664811 is 1184666.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6664811 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (6664831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3332405 + 3332406.

It is an arithmetic number, because the mean of its divisors is an integer number (3332406).

Almost surely, 2^6664811 is an apocalyptic number.

6664811 is a deficient number, since it is larger than the sum of its proper divisors (1).

6664811 is an equidigital number, since it uses as much as digits as its factorization.

6664811 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6912, while the sum is 32.

The square root of 6664811 is about 2581.6295241572. The cubic root of 6664811 is about 188.1897416638.

The spelling of 6664811 in words is "six million, six hundred sixty-four thousand, eight hundred eleven".