1668036211 has 2 divisors, whose sum is σ = 1668036212. Its totient is φ = 1668036210.

The previous prime is 1668036197. The next prime is 1668036241. The reversal of 1668036211 is 1126308661.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (1126308661) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1668036211 - 2¹¹ = 1668034163 is a prime.

It is not a weakly prime, because it can be changed into another prime (1668036241) 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, 834018105 + 834018106.

It is an arithmetic number, because the mean of its divisors is an integer number (834018106).

Almost surely, 2^1668036211 is an apocalyptic number.

1668036211 is a deficient number, since it is larger than the sum of its proper divisors (1).

1668036211 is an equidigital number, since it uses as much as digits as its factorization.

1668036211 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10368, while the sum is 34.

The square root of 1668036211 is about 40841.5990259931. The cubic root of 1668036211 is about 1185.9557674553.

The spelling of 1668036211 in words is "one billion, six hundred sixty-eight million, thirty-six thousand, two hundred eleven".