66000203 has 2 divisors, whose sum is σ = 66000204. Its totient is φ = 66000202.

The previous prime is 66000169. The next prime is 66000217. The reversal of 66000203 is 30200066.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66000203 - 2¹⁶ = 65934667 is a prime.

It is not a weakly prime, because it can be changed into another prime (66000223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33000101 + 33000102.

It is an arithmetic number, because the mean of its divisors is an integer number (33000102).

Almost surely, 2^66000203 is an apocalyptic number.

66000203 is a deficient number, since it is larger than the sum of its proper divisors (1).

66000203 is an equidigital number, since it uses as much as digits as its factorization.

66000203 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 17.

The square root of 66000203 is about 8124.0508984127. The cubic root of 66000203 is about 404.1244163909.

Adding to 66000203 its reverse (30200066), we get a palindrome (96200269).

The spelling of 66000203 in words is "sixty-six million, two hundred three", and thus it is an aban number.