668325018 has 16 divisors (see below), whose sum is σ = 1361870496. Its totient is φ = 218571600.

The previous prime is 668325017. The next prime is 668325041. The reversal of 668325018 is 810523866.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (668325011) by changing a digit.

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 in 7 ways as a sum of consecutive naturals, for example, 1050508 + ... + 1051143.

It is an arithmetic number, because the mean of its divisors is an integer number (85116906).

Almost surely, 2^668325018 is an apocalyptic number.

668325018 is an abundant number, since it is smaller than the sum of its proper divisors (693545478).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

668325018 is a wasteful number, since it uses less digits than its factorization.

668325018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2101709.

The product of its (nonzero) digits is 69120, while the sum is 39.

The square root of 668325018 is about 25851.9828639894. The cubic root of 668325018 is about 874.3042166144.

The spelling of 668325018 in words is "six hundred sixty-eight million, three hundred twenty-five thousand, eighteen".