1668335004 has 72 divisors (see below), whose sum is σ = 4832828000. Its totient is φ = 475362432.

The previous prime is 1668334999. The next prime is 1668335023. The reversal of 1668335004 is 4005338661.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 1668335004.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 85122 + ... + 102870.

Almost surely, 2^1668335004 is an apocalyptic number.

1668335004 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1668335004, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2416414000).

1668335004 is an abundant number, since it is smaller than the sum of its proper divisors (3164492996).

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

1668335004 is a wasteful number, since it uses less digits than its factorization.

1668335004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18139 (or 18134 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 36.

The square root of 1668335004 is about 40845.2568115320. The cubic root of 1668335004 is about 1186.0265760951.

The spelling of 1668335004 in words is "one billion, six hundred sixty-eight million, three hundred thirty-five thousand, four".