518660073 has 12 divisors (see below), whose sum is σ = 749447920. Its totient is φ = 345647736.

The previous prime is 518660059. The next prime is 518660141. The reversal of 518660073 is 370066815.

It is not a de Polignac number, because 518660073 - 2²² = 514465769 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (518660033) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20490 + ... + 38172.

Almost surely, 2^518660073 is an apocalyptic number.

It is an amenable number.

518660073 is a deficient number, since it is larger than the sum of its proper divisors (230787847).

518660073 is a wasteful number, since it uses less digits than its factorization.

518660073 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20948 (or 20945 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 36.

The square root of 518660073 is about 22774.1097081752. The cubic root of 518660073 is about 803.4538551674.

The spelling of 518660073 in words is "five hundred eighteen million, six hundred sixty thousand, seventy-three".