1666063211 has 2 divisors, whose sum is σ = 1666063212. Its totient is φ = 1666063210.

The previous prime is 1666063187. The next prime is 1666063277. The reversal of 1666063211 is 1123606661.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1666063211 - 2¹⁴ = 1666046827 is a prime.

It is not a weakly prime, because it can be changed into another prime (1666060211) 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, 833031605 + 833031606.

It is an arithmetic number, because the mean of its divisors is an integer number (833031606).

Almost surely, 2^1666063211 is an apocalyptic number.

1666063211 is a deficient number, since it is larger than the sum of its proper divisors (1).

1666063211 is an equidigital number, since it uses as much as digits as its factorization.

1666063211 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 32.

The square root of 1666063211 is about 40817.4375849342. The cubic root of 1666063211 is about 1185.4879890615.

Adding to 1666063211 its reverse (1123606661), we get a palindrome (2789669872).

The spelling of 1666063211 in words is "one billion, six hundred sixty-six million, sixty-three thousand, two hundred eleven".