6660211 has 2 divisors, whose sum is σ = 6660212. Its totient is φ = 6660210.

The previous prime is 6660197. The next prime is 6660217. The reversal of 6660211 is 1120666.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6660211 - 2¹⁵ = 6627443 is a prime.

It is not a weakly prime, because it can be changed into another prime (6660217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3330105 + 3330106.

It is an arithmetic number, because the mean of its divisors is an integer number (3330106).

Almost surely, 2^6660211 is an apocalyptic number.

6660211 is a deficient number, since it is larger than the sum of its proper divisors (1).

6660211 is an equidigital number, since it uses as much as digits as its factorization.

6660211 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 6660211 is about 2580.7384602086. The cubic root of 6660211 is about 188.1464360073.

Adding to 6660211 its reverse (1120666), we get a palindrome (7780877).

The spelling of 6660211 in words is "six million, six hundred sixty thousand, two hundred eleven".