166500203 has 2 divisors, whose sum is σ = 166500204. Its totient is φ = 166500202.

The previous prime is 166500143. The next prime is 166500253. The reversal of 166500203 is 302005661.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 166500203 - 2²⁴ = 149722987 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (166500253) 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, 83250101 + 83250102.

It is an arithmetic number, because the mean of its divisors is an integer number (83250102).

Almost surely, 2^166500203 is an apocalyptic number.

166500203 is a deficient number, since it is larger than the sum of its proper divisors (1).

166500203 is an equidigital number, since it uses as much as digits as its factorization.

166500203 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1080, while the sum is 23.

The square root of 166500203 is about 12903.4957666518. The cubic root of 166500203 is about 550.1379301450.

Adding to 166500203 its reverse (302005661), we get a palindrome (468505864).

The spelling of 166500203 in words is "one hundred sixty-six million, five hundred thousand, two hundred three".