668373 has 4 divisors (see below), whose sum is σ = 891168. Its totient is φ = 445580.

The previous prime is 668347. The next prime is 668407. The reversal of 668373 is 373866.

It is a happy number.

668373 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, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 668373 - 2⁹ = 667861 is a prime.

It is a super-3 number, since 3×668373³ = 895731706567233351, which contains 333 as substring.

It is a D-number.

It is a Curzon number.

It is a congruent number.

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, 111393 + ... + 111398.

It is an arithmetic number, because the mean of its divisors is an integer number (222792).

2⁶⁶⁸³⁷³ is an apocalyptic number.

It is an amenable number.

668373 is a deficient number, since it is larger than the sum of its proper divisors (222795).

668373 is a wasteful number, since it uses less digits than its factorization.

668373 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 222794.

The product of its digits is 18144, while the sum is 33.

The square root of 668373 is about 817.5408246687. The cubic root of 668373 is about 87.4325139499.

The spelling of 668373 in words is "six hundred sixty-eight thousand, three hundred seventy-three".