668486 has 16 divisors (see below), whose sum is σ = 1234464. Its totient is φ = 264384.

The previous prime is 668471. The next prime is 668509. The reversal of 668486 is 684866.

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1655 + ... + 2018.

It is an arithmetic number, because the mean of its divisors is an integer number (77154).

2⁶⁶⁸⁴⁸⁶ is an apocalyptic number.

668486 is a deficient number, since it is larger than the sum of its proper divisors (565978).

668486 is a wasteful number, since it uses less digits than its factorization.

668486 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3695.

The product of its digits is 55296, while the sum is 38.

The square root of 668486 is about 817.6099314465. The cubic root of 668486 is about 87.4374409978.

The spelling of 668486 in words is "six hundred sixty-eight thousand, four hundred eighty-six".