6662209 has 2 divisors, whose sum is σ = 6662210. Its totient is φ = 6662208.

The previous prime is 6662197. The next prime is 6662231. The reversal of 6662209 is 9022666.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6517809 + 144400 = 2553^2 + 380^2 .

It is a cyclic number.

It is not a de Polignac number, because 6662209 - 2⁵ = 6662177 is a prime.

It is not a weakly prime, because it can be changed into another prime (6662009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3331104 + 3331105.

It is an arithmetic number, because the mean of its divisors is an integer number (3331105).

Almost surely, 2^6662209 is an apocalyptic number.

It is an amenable number.

6662209 is a deficient number, since it is larger than the sum of its proper divisors (1).

6662209 is an equidigital number, since it uses as much as digits as its factorization.

6662209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7776, while the sum is 31.

The square root of 6662209 is about 2581.1255296866. The cubic root of 6662209 is about 188.1652481738.

The spelling of 6662209 in words is "six million, six hundred sixty-two thousand, two hundred nine".