66845299 has 2 divisors, whose sum is σ = 66845300. Its totient is φ = 66845298.

The previous prime is 66845279. The next prime is 66845321. The reversal of 66845299 is 99254866.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66845299 - 2⁹ = 66844787 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (66845279) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33422649 + 33422650.

It is an arithmetic number, because the mean of its divisors is an integer number (33422650).

Almost surely, 2^66845299 is an apocalyptic number.

66845299 is a deficient number, since it is larger than the sum of its proper divisors (1).

66845299 is an equidigital number, since it uses as much as digits as its factorization.

66845299 is an evil number, because the sum of its binary digits is even.

The product of its digits is 933120, while the sum is 49.

The square root of 66845299 is about 8175.8974430945. The cubic root of 66845299 is about 405.8419693635.

The spelling of 66845299 in words is "sixty-six million, eight hundred forty-five thousand, two hundred ninety-nine".