668323 has 4 divisors (see below), whose sum is σ = 677808. Its totient is φ = 658840.

The previous prime is 668303. The next prime is 668347. The reversal of 668323 is 323866.

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 668323 - 2¹³ = 660131 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 668291 and 668300.

It is not an unprimeable number, because it can be changed into a prime (668303) 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, 4636 + ... + 4777.

It is an arithmetic number, because the mean of its divisors is an integer number (169452).

2⁶⁶⁸³²³ is an apocalyptic number.

668323 is a deficient number, since it is larger than the sum of its proper divisors (9485).

668323 is an equidigital number, since it uses as much as digits as its factorization.

668323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9484.

The product of its digits is 5184, while the sum is 28.

The square root of 668323 is about 817.5102445841. The cubic root of 668323 is about 87.4303336630.

The spelling of 668323 in words is "six hundred sixty-eight thousand, three hundred twenty-three".