20166650888 has 8 divisors (see below), whose sum is σ = 37812470430. Its totient is φ = 10083325440.

The previous prime is 20166650869. The next prime is 20166650897. The reversal of 20166650888 is 88805666102.

It can be written as a sum of positive squares in only one way, i.e., 20152073764 + 14577124 = 141958^2 + 3818^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1260415673 + ... + 1260415688.

Almost surely, 2^20166650888 is an apocalyptic number.

It is an amenable number.

20166650888 is a deficient number, since it is larger than the sum of its proper divisors (17645819542).

20166650888 is a wasteful number, since it uses less digits than its factorization.

20166650888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2520831367 (or 2520831363 counting only the distinct ones).

The product of its (nonzero) digits is 1105920, while the sum is 50.

The spelling of 20166650888 in words is "twenty billion, one hundred sixty-six million, six hundred fifty thousand, eight hundred eighty-eight".