668825 has 12 divisors (see below), whose sum is σ = 857088. Its totient is φ = 517200.

The previous prime is 668821. The next prime is 668851. The reversal of 668825 is 528866.

It is not a de Polignac number, because 668825 - 2² = 668821 is a prime.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 668825.

It is not an unprimeable number, because it can be changed into a prime (668821) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 344 + ... + 1206.

It is an arithmetic number, because the mean of its divisors is an integer number (71424).

2⁶⁶⁸⁸²⁵ is an apocalyptic number.

It is an amenable number.

668825 is a deficient number, since it is larger than the sum of its proper divisors (188263).

668825 is a wasteful number, since it uses less digits than its factorization.

668825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 904 (or 899 counting only the distinct ones).

The product of its digits is 23040, while the sum is 35.

The square root of 668825 is about 817.8172167422. The cubic root of 668825 is about 87.4522188108.

The spelling of 668825 in words is "six hundred sixty-eight thousand, eight hundred twenty-five".