66303233 has 2 divisors, whose sum is σ = 66303234. Its totient is φ = 66303232.

The previous prime is 66303187. The next prime is 66303239. The reversal of 66303233 is 33230366.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 53465344 + 12837889 = 7312^2 + 3583^2 .

It is a cyclic number.

It is not a de Polignac number, because 66303233 - 2⁶ = 66303169 is a prime.

It is a super-2 number, since 2×66303233² = 8792237412504578, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (66303239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33151616 + 33151617.

It is an arithmetic number, because the mean of its divisors is an integer number (33151617).

Almost surely, 2^66303233 is an apocalyptic number.

It is an amenable number.

66303233 is a deficient number, since it is larger than the sum of its proper divisors (1).

66303233 is an equidigital number, since it uses as much as digits as its factorization.

66303233 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5832, while the sum is 26.

The square root of 66303233 is about 8142.6797186184. The cubic root of 66303233 is about 404.7419643745.

Adding to 66303233 its reverse (33230366), we get a palindrome (99533599).

The spelling of 66303233 in words is "sixty-six million, three hundred three thousand, two hundred thirty-three".