66743 has 4 divisors (see below), whose sum is σ = 68928. Its totient is φ = 64560.

The previous prime is 66739. The next prime is 66749. The reversal of 66743 is 34766.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34766 = 2 ⋅17383.

It is a cyclic number.

It is not a de Polignac number, because 66743 - 2² = 66739 is a prime.

It is a Duffinian number.

It is a plaindrome in base 9.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66749) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1046 + ... + 1107.

It is an arithmetic number, because the mean of its divisors is an integer number (17232).

2⁶⁶⁷⁴³ is an apocalyptic number.

66743 is a deficient number, since it is larger than the sum of its proper divisors (2185).

66743 is a wasteful number, since it uses less digits than its factorization.

66743 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2184.

The product of its digits is 3024, while the sum is 26.

The square root of 66743 is about 258.3466663226. The cubic root of 66743 is about 40.5634832260.

The spelling of 66743 in words is "sixty-six thousand, seven hundred forty-three".