668286 has 24 divisors (see below), whose sum is σ = 1463904. Its totient is φ = 220320.

The previous prime is 668273. The next prime is 668303. The reversal of 668286 is 682866.

It is a plaindrome in base 14.

It is a self number, because there is not a number n which added to its sum of digits gives 668286.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2331 + ... + 2601.

It is an arithmetic number, because the mean of its divisors is an integer number (60996).

2⁶⁶⁸²⁸⁶ is an apocalyptic number.

668286 is an abundant number, since it is smaller than the sum of its proper divisors (795618).

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

668286 is a wasteful number, since it uses less digits than its factorization.

668286 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 416 (or 413 counting only the distinct ones).

The product of its digits is 27648, while the sum is 36.

The square root of 668286 is about 817.4876145851. The cubic root of 668286 is about 87.4287201806.

The spelling of 668286 in words is "six hundred sixty-eight thousand, two hundred eighty-six".