66683143 has 2 divisors, whose sum is σ = 66683144. Its totient is φ = 66683142.

The previous prime is 66683117. The next prime is 66683159. The reversal of 66683143 is 34138666.

66683143 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66683143 - 2⁹ = 66682631 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66681143) 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, 33341571 + 33341572.

It is an arithmetic number, because the mean of its divisors is an integer number (33341572).

Almost surely, 2^66683143 is an apocalyptic number.

66683143 is a deficient number, since it is larger than the sum of its proper divisors (1).

66683143 is an equidigital number, since it uses as much as digits as its factorization.

66683143 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 62208, while the sum is 37.

The square root of 66683143 is about 8165.9747121823. The cubic root of 66683143 is about 405.5135344159.

The spelling of 66683143 in words is "sixty-six million, six hundred eighty-three thousand, one hundred forty-three".