66423043 has 2 divisors, whose sum is σ = 66423044. Its totient is φ = 66423042.

The previous prime is 66423041. The next prime is 66423067. The reversal of 66423043 is 34032466.

66423043 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66423043 - 2¹ = 66423041 is a prime.

Together with 66423041, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (66423041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33211521 + 33211522.

It is an arithmetic number, because the mean of its divisors is an integer number (33211522).

Almost surely, 2^66423043 is an apocalyptic number.

66423043 is a deficient number, since it is larger than the sum of its proper divisors (1).

66423043 is an equidigital number, since it uses as much as digits as its factorization.

66423043 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10368, while the sum is 28.

The square root of 66423043 is about 8150.0333128154. The cubic root of 66423043 is about 404.9856073735.

The spelling of 66423043 in words is "sixty-six million, four hundred twenty-three thousand, forty-three".