668208 has 20 divisors (see below), whose sum is σ = 1726328. Its totient is φ = 222720.
The previous prime is 668203. The next prime is 668209. The reversal of 668208 is 802866.
It is not an unprimeable number, because it can be changed into a prime (668201) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (7) of ones.
It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6913 + ... + 7008.
2668208 is an apocalyptic number.
It is an amenable number.
668208 is an abundant number, since it is smaller than the sum of its proper divisors (1058120).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
668208 is a wasteful number, since it uses less digits than its factorization.
668208 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 13932 (or 13926 counting only the distinct ones).
The product of its (nonzero) digits is 4608, while the sum is 30.
The square root of 668208 is about 817.4399060481. The cubic root of 668208 is about 87.4253185903.
The spelling of 668208 in words is "six hundred sixty-eight thousand, two hundred eight".
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