1668620504 has 16 divisors (see below), whose sum is σ = 3201423720. Its totient is φ = 814907520.

The previous prime is 1668620483. The next prime is 1668620507. The reversal of 1668620504 is 4050268661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1668620507) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2424977 + ... + 2425664.

Almost surely, 2^1668620504 is an apocalyptic number.

It is an amenable number.

1668620504 is a deficient number, since it is larger than the sum of its proper divisors (1532803216).

1668620504 is a wasteful number, since it uses less digits than its factorization.

1668620504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4850690 (or 4850686 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 38.

The square root of 1668620504 is about 40848.7515598702. The cubic root of 1668620504 is about 1186.0942266315.

The spelling of 1668620504 in words is "one billion, six hundred sixty-eight million, six hundred twenty thousand, five hundred four".