6665519328173 has 16 divisors (see below), whose sum is σ = 6759577124736. Its totient is φ = 6572041358400.

The previous prime is 6665519328137. The next prime is 6665519328179. The reversal of 6665519328173 is 3718239155666.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 6665519328173 - 2³⁶ = 6596799851437 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 (6665519328179) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 45574040 + ... + 45720062.

It is an arithmetic number, because the mean of its divisors is an integer number (422473570296).

Almost surely, 2^{6665519328173} is an apocalyptic number.

It is an amenable number.

6665519328173 is a deficient number, since it is larger than the sum of its proper divisors (94057796563).

6665519328173 is a wasteful number, since it uses less digits than its factorization.

6665519328173 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148004.

The product of its digits is 48988800, while the sum is 62.

The spelling of 6665519328173 in words is "six trillion, six hundred sixty-five billion, five hundred nineteen million, three hundred twenty-eight thousand, one hundred seventy-three".