6685221227 has 2 divisors, whose sum is σ = 6685221228. Its totient is φ = 6685221226.

The previous prime is 6685221211. The next prime is 6685221247. The reversal of 6685221227 is 7221225866.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6685221227 - 2⁴ = 6685221211 is a prime.

It is not a weakly prime, because it can be changed into another prime (6685221247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3342610613 + 3342610614.

It is an arithmetic number, because the mean of its divisors is an integer number (3342610614).

Almost surely, 2^6685221227 is an apocalyptic number.

6685221227 is a deficient number, since it is larger than the sum of its proper divisors (1).

6685221227 is an equidigital number, since it uses as much as digits as its factorization.

6685221227 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 161280, while the sum is 41.

The square root of 6685221227 is about 81763.2021572052. The cubic root of 6685221227 is about 1883.8164913790.

The spelling of 6685221227 in words is "six billion, six hundred eighty-five million, two hundred twenty-one thousand, two hundred twenty-seven".