66423 has 8 divisors (see below), whose sum is σ = 101248. Its totient is φ = 37944.

The previous prime is 66413. The next prime is 66431. The reversal of 66423 is 32466.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 66423 - 2⁶ = 66359 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 3163 = 66423 / (6 + 6 + 4 + 2 + 3).

It is a d-powerful number, because it can be written as 6² + 6⁶ + 4² + 2⁵ + 3⁹ .

It is a self number, because there is not a number n which added to its sum of digits gives 66423.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66403) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1561 + ... + 1602.

It is an arithmetic number, because the mean of its divisors is an integer number (12656).

2⁶⁶⁴²³ is an apocalyptic number.

66423 is a deficient number, since it is larger than the sum of its proper divisors (34825).

66423 is a wasteful number, since it uses less digits than its factorization.

66423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3173.

The product of its digits is 864, while the sum is 21.

The square root of 66423 is about 257.7265993257. The cubic root of 66423 is about 40.4985519982.

Adding to 66423 its reverse (32466), we get a palindrome (98889).

The spelling of 66423 in words is "sixty-six thousand, four hundred twenty-three".