18616075866 has 12 divisors (see below), whose sum is σ = 40334831082. Its totient is φ = 6205358616.

The previous prime is 18616075813. The next prime is 18616075939. The reversal of 18616075866 is 66857061681.

18616075866 is a `hidden beast` number, since 18 + 616 + 0 + 7 + 5 + 8 + 6 + 6 = 666.

It can be written as a sum of positive squares in only one way, i.e., 18180477225 + 435598641 = 134835^2 + 20871^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 517113201 + ... + 517113236.

Almost surely, 2^18616075866 is an apocalyptic number.

18616075866 is an abundant number, since it is smaller than the sum of its proper divisors (21718755216).

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

18616075866 is a wasteful number, since it uses less digits than its factorization.

18616075866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1034226445 (or 1034226442 counting only the distinct ones).

The product of its (nonzero) digits is 2903040, while the sum is 54.

The spelling of 18616075866 in words is "eighteen billion, six hundred sixteen million, seventy-five thousand, eight hundred sixty-six".