1668004408 has 16 divisors (see below), whose sum is σ = 3574295280. Its totient is φ = 714859008.

The previous prime is 1668004343. The next prime is 1668004417. The reversal of 1668004408 is 8044008661.

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 in 3 ways as a sum of consecutive naturals, for example, 14892841 + ... + 14892952.

It is an arithmetic number, because the mean of its divisors is an integer number (223393455).

Almost surely, 2^1668004408 is an apocalyptic number.

It is an amenable number.

1668004408 is an abundant number, since it is smaller than the sum of its proper divisors (1906290872).

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

1668004408 is a wasteful number, since it uses less digits than its factorization.

1668004408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29785806 (or 29785802 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 37.

The square root of 1668004408 is about 40841.2096784608. The cubic root of 1668004408 is about 1185.9482302107.

The spelling of 1668004408 in words is "one billion, six hundred sixty-eight million, four thousand, four hundred eight".