668165308 has 6 divisors (see below), whose sum is σ = 1169289296. Its totient is φ = 334082652.

The previous prime is 668165291. The next prime is 668165321. The reversal of 668165308 is 803561866.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83520660 + ... + 83520667.

Almost surely, 2^668165308 is an apocalyptic number.

It is an amenable number.

668165308 is a deficient number, since it is larger than the sum of its proper divisors (501123988).

668165308 is a wasteful number, since it uses less digits than its factorization.

668165308 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 167041331 (or 167041329 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 43.

The square root of 668165308 is about 25848.8937480891. The cubic root of 668165308 is about 874.2345667449.

The spelling of 668165308 in words is "six hundred sixty-eight million, one hundred sixty-five thousand, three hundred eight".