668383208 has 32 divisors (see below), whose sum is σ = 1275341760. Its totient is φ = 328325760.

The previous prime is 668383187. The next prime is 668383231. The reversal of 668383208 is 802383866.

It is a super-2 number, since 2×668383208² = 893472225472742528, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 172460 + ... + 176292.

It is an arithmetic number, because the mean of its divisors is an integer number (39854430).

Almost surely, 2^668383208 is an apocalyptic number.

It is an amenable number.

668383208 is a deficient number, since it is larger than the sum of its proper divisors (606958552).

668383208 is a wasteful number, since it uses less digits than its factorization.

668383208 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4217 (or 4213 counting only the distinct ones).

The product of its (nonzero) digits is 331776, while the sum is 44.

The square root of 668383208 is about 25853.1082850786. The cubic root of 668383208 is about 874.3295906388.

The spelling of 668383208 in words is "six hundred sixty-eight million, three hundred eighty-three thousand, two hundred eight".