66345143 has 2 divisors, whose sum is σ = 66345144. Its totient is φ = 66345142.

The previous prime is 66345121. The next prime is 66345151. The reversal of 66345143 is 34154366.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66345143 - 2¹⁶ = 66279607 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66345163) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33172571 + 33172572.

It is an arithmetic number, because the mean of its divisors is an integer number (33172572).

Almost surely, 2^66345143 is an apocalyptic number.

66345143 is a deficient number, since it is larger than the sum of its proper divisors (1).

66345143 is an equidigital number, since it uses as much as digits as its factorization.

66345143 is an evil number, because the sum of its binary digits is even.

The product of its digits is 25920, while the sum is 32.

The square root of 66345143 is about 8145.2527892018. The cubic root of 66345143 is about 404.8272249879.

The spelling of 66345143 in words is "sixty-six million, three hundred forty-five thousand, one hundred forty-three".