668498 has 8 divisors (see below), whose sum is σ = 1015680. Its totient is φ = 329940.

The previous prime is 668471. The next prime is 668509. The reversal of 668498 is 894866.

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

It is a super-3 number, since 3×668498³ = 896234363338565976, which contains 333 as substring.

It is a Curzon number.

It is a plaindrome in base 14.

It is a congruent number.

It is an unprimeable number.

668498 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, 1958 + ... + 2273.

It is an arithmetic number, because the mean of its divisors is an integer number (126960).

2⁶⁶⁸⁴⁹⁸ is an apocalyptic number.

668498 is a deficient number, since it is larger than the sum of its proper divisors (347182).

668498 is a wasteful number, since it uses less digits than its factorization.

668498 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4312.

The product of its digits is 82944, while the sum is 41.

The square root of 668498 is about 817.6172698763. The cubic root of 668498 is about 87.4379641915.

The spelling of 668498 in words is "six hundred sixty-eight thousand, four hundred ninety-eight".