668246 has 8 divisors (see below), whose sum is σ = 1023840. Its totient is φ = 326968.

The previous prime is 668243. The next prime is 668273. The reversal of 668246 is 642866.

It is a happy number.

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

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (668243) 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, 3461 + ... + 3648.

It is an arithmetic number, because the mean of its divisors is an integer number (127980).

2⁶⁶⁸²⁴⁶ is an apocalyptic number.

668246 is a deficient number, since it is larger than the sum of its proper divisors (355594).

668246 is a wasteful number, since it uses less digits than its factorization.

668246 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7158.

The product of its digits is 13824, while the sum is 32.

The square root of 668246 is about 817.4631490165. The cubic root of 668246 is about 87.4269758084.

The spelling of 668246 in words is "six hundred sixty-eight thousand, two hundred forty-six".