666323 has 4 divisors (see below), whose sum is σ = 761520. Its totient is φ = 571128.

The previous prime is 666301. The next prime is 666329. The reversal of 666323 is 323666.

It is a happy number.

666323 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 666323 - 2⁸ = 666067 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 666292 and 666301.

It is not an unprimeable number, because it can be changed into a prime (666329) 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, 47588 + ... + 47601.

It is an arithmetic number, because the mean of its divisors is an integer number (190380).

2⁶⁶⁶³²³ is an apocalyptic number.

666323 is a deficient number, since it is larger than the sum of its proper divisors (95197).

666323 is an equidigital number, since it uses as much as digits as its factorization.

666323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95196.

The product of its digits is 3888, while the sum is 26.

The square root of 666323 is about 816.2861018050. The cubic root of 666323 is about 87.3430328692.

Adding to 666323 its reverse (323666), we get a palindrome (989989).

It can be divided in two parts, 666 and 323, that added together give a palindrome (989).

The spelling of 666323 in words is "six hundred sixty-six thousand, three hundred twenty-three".