668289884 has 12 divisors (see below), whose sum is σ = 1169752584. Its totient is φ = 334074864.

The previous prime is 668289871. The next prime is 668289887. The reversal of 668289884 is 488982866.

It is a super-2 number, since 2×668289884² = 893222738113466912, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (668289887) 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 3 ways as a sum of consecutive naturals, for example, 8099 + ... + 37445.

It is an arithmetic number, because the mean of its divisors is an integer number (97479382).

Almost surely, 2^668289884 is an apocalyptic number.

It is an amenable number.

668289884 is a deficient number, since it is larger than the sum of its proper divisors (501462700).

668289884 is a wasteful number, since it uses less digits than its factorization.

668289884 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35044 (or 35042 counting only the distinct ones).

The product of its digits is 10616832, while the sum is 59.

The square root of 668289884 is about 25851.3033327142. The cubic root of 668289884 is about 874.2888955546.

The spelling of 668289884 in words is "six hundred sixty-eight million, two hundred eighty-nine thousand, eight hundred eighty-four".