668046 has 8 divisors (see below), whose sum is σ = 1336104. Its totient is φ = 222680.

The previous prime is 668033. The next prime is 668047. The reversal of 668046 is 640866.

It is a happy number.

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

668046 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (668047) by changing a digit.

668046 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55665 + ... + 55676.

It is an arithmetic number, because the mean of its divisors is an integer number (167013).

2⁶⁶⁸⁰⁴⁶ is an apocalyptic number.

668046 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

668046 is a wasteful number, since it uses less digits than its factorization.

668046 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111346.

The product of its (nonzero) digits is 6912, while the sum is 30.

The square root of 668046 is about 817.3408101887. The cubic root of 668046 is about 87.4182529031.

The spelling of 668046 in words is "six hundred sixty-eight thousand, forty-six".