668492 has 12 divisors (see below), whose sum is σ = 1276296. Its totient is φ = 303840.

The previous prime is 668471. The next prime is 668509. The reversal of 668492 is 294866.

It is a plaindrome in base 9.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 668492.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7553 + ... + 7640.

It is an arithmetic number, because the mean of its divisors is an integer number (106358).

2⁶⁶⁸⁴⁹² is an apocalyptic number.

It is an amenable number.

668492 is a deficient number, since it is larger than the sum of its proper divisors (607804).

668492 is a wasteful number, since it uses less digits than its factorization.

668492 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15208 (or 15206 counting only the distinct ones).

The product of its digits is 20736, while the sum is 35.

The square root of 668492 is about 817.6136006697. The cubic root of 668492 is about 87.4377025954.

It can be divided in two parts, 6684 and 92, that added together give a palindrome (6776).

The spelling of 668492 in words is "six hundred sixty-eight thousand, four hundred ninety-two".