66943 has 2 divisors, whose sum is σ = 66944. Its totient is φ = 66942.

The previous prime is 66931. The next prime is 66947. The reversal of 66943 is 34966.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66943 - 2⁹ = 66431 is a prime.

66943 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66947) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33471 + 33472.

It is an arithmetic number, because the mean of its divisors is an integer number (33472).

2⁶⁶⁹⁴³ is an apocalyptic number.

66943 is a deficient number, since it is larger than the sum of its proper divisors (1).

66943 is an equidigital number, since it uses as much as digits as its factorization.

66943 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3888, while the sum is 28.

The square root of 66943 is about 258.7334535772. The cubic root of 66943 is about 40.6039599137.

The spelling of 66943 in words is "sixty-six thousand, nine hundred forty-three".