1668505023 has 6 divisors (see below), whose sum is σ = 2410062824. Its totient is φ = 1112336676.

The previous prime is 1668505021. The next prime is 1668505063. The reversal of 1668505023 is 3205058661.

It is not a de Polignac number, because 1668505023 - 2¹ = 1668505021 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1668505021) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 92694715 + ... + 92694732.

Almost surely, 2^1668505023 is an apocalyptic number.

1668505023 is a deficient number, since it is larger than the sum of its proper divisors (741557801).

1668505023 is a wasteful number, since it uses less digits than its factorization.

1668505023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 185389453 (or 185389450 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 36.

The square root of 1668505023 is about 40847.3380160813. The cubic root of 1668505023 is about 1186.0668638075.

The spelling of 1668505023 in words is "one billion, six hundred sixty-eight million, five hundred five thousand, twenty-three".