18016653166506 has 12 divisors (see below), whose sum is σ = 39036081860802. Its totient is φ = 6005551055496.

The previous prime is 18016653166453. The next prime is 18016653166511. The reversal of 18016653166506 is 60566135661081.

18016653166506 is a `hidden beast` number, since 1 + 8 + 0 + 16 + 65 + 3 + 1 + 66 + 506 = 666.

It can be written as a sum of positive squares in only one way, i.e., 17740564922025 + 276088244481 = 4211955^2 + 525441^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 500462587941 + ... + 500462587976.

Almost surely, 2^{18016653166506} is an apocalyptic number.

18016653166506 is an abundant number, since it is smaller than the sum of its proper divisors (21019428694296).

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

18016653166506 is a wasteful number, since it uses less digits than its factorization.

18016653166506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1000925175925 (or 1000925175922 counting only the distinct ones).

The product of its (nonzero) digits is 4665600, while the sum is 54.

The spelling of 18016653166506 in words is "eighteen trillion, sixteen billion, six hundred fifty-three million, one hundred sixty-six thousand, five hundred six".