66023 has 4 divisors (see below), whose sum is σ = 66768. Its totient is φ = 65280.

The previous prime is 65993. The next prime is 66029. The reversal of 66023 is 32066.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 32066 = 2 ⋅16033.

It is a cyclic number.

It is not a de Polignac number, because 66023 - 2¹² = 61927 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 65992 and 66010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66029) 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, 218 + ... + 423.

It is an arithmetic number, because the mean of its divisors is an integer number (16692).

2⁶⁶⁰²³ is an apocalyptic number.

66023 is a deficient number, since it is larger than the sum of its proper divisors (745).

66023 is a wasteful number, since it uses less digits than its factorization.

66023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 744.

The product of its (nonzero) digits is 216, while the sum is 17.

The square root of 66023 is about 256.9494113634. The cubic root of 66023 is about 40.4170940307.

Adding to 66023 its reverse (32066), we get a palindrome (98089).

The spelling of 66023 in words is "sixty-six thousand, twenty-three".