166303211 has 2 divisors, whose sum is σ = 166303212. Its totient is φ = 166303210.

The previous prime is 166303183. The next prime is 166303213. The reversal of 166303211 is 112303661.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 166303211 - 2⁶ = 166303147 is a prime.

Together with 166303213, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (166303213) 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, 83151605 + 83151606.

It is an arithmetic number, because the mean of its divisors is an integer number (83151606).

Almost surely, 2^166303211 is an apocalyptic number.

166303211 is a deficient number, since it is larger than the sum of its proper divisors (1).

166303211 is an equidigital number, since it uses as much as digits as its factorization.

166303211 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 648, while the sum is 23.

The square root of 166303211 is about 12895.8602272202. The cubic root of 166303211 is about 549.9208822833.

Adding to 166303211 its reverse (112303661), we get a palindrome (278606872).

The spelling of 166303211 in words is "one hundred sixty-six million, three hundred three thousand, two hundred eleven".