66473443 has 2 divisors, whose sum is σ = 66473444. Its totient is φ = 66473442.

The previous prime is 66473431. The next prime is 66473489. The reversal of 66473443 is 34437466.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66473443 - 2¹⁷ = 66342371 is a prime.

It is not a weakly prime, because it can be changed into another prime (66473413) 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, 33236721 + 33236722.

It is an arithmetic number, because the mean of its divisors is an integer number (33236722).

Almost surely, 2^66473443 is an apocalyptic number.

66473443 is a deficient number, since it is larger than the sum of its proper divisors (1).

66473443 is an equidigital number, since it uses as much as digits as its factorization.

66473443 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 145152, while the sum is 37.

The square root of 66473443 is about 8153.1247384055. The cubic root of 66473443 is about 405.0880121684.

The spelling of 66473443 in words is "sixty-six million, four hundred seventy-three thousand, four hundred forty-three".