9666143 has 2 divisors, whose sum is σ = 9666144. Its totient is φ = 9666142.

The previous prime is 9666131. The next prime is 9666169. The reversal of 9666143 is 3416669.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9666143 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 (9666043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4833071 + 4833072.

It is an arithmetic number, because the mean of its divisors is an integer number (4833072).

Almost surely, 2^9666143 is an apocalyptic number.

9666143 is a deficient number, since it is larger than the sum of its proper divisors (1).

9666143 is an equidigital number, since it uses as much as digits as its factorization.

9666143 is an evil number, because the sum of its binary digits is even.

The product of its digits is 23328, while the sum is 35.

The square root of 9666143 is about 3109.0421354494. The cubic root of 9666143 is about 213.0187042286.

The spelling of 9666143 in words is "nine million, six hundred sixty-six thousand, one hundred forty-three".