66307303 has 2 divisors, whose sum is σ = 66307304. Its totient is φ = 66307302.

The previous prime is 66307301. The next prime is 66307313. The reversal of 66307303 is 30370366.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66307303 - 2¹ = 66307301 is a prime.

It is a super-2 number, since 2×66307303² = 8793316862267618, which contains 22 as substring.

Together with 66307301, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66307301) 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, 33153651 + 33153652.

It is an arithmetic number, because the mean of its divisors is an integer number (33153652).

Almost surely, 2^66307303 is an apocalyptic number.

66307303 is a deficient number, since it is larger than the sum of its proper divisors (1).

66307303 is an equidigital number, since it uses as much as digits as its factorization.

66307303 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6804, while the sum is 28.

The square root of 66307303 is about 8142.9296325094. The cubic root of 66307303 is about 404.7502458515.

Adding to 66307303 its reverse (30370366), we get a palindrome (96677669).

The spelling of 66307303 in words is "sixty-six million, three hundred seven thousand, three hundred three".