16663541644424 has 8 divisors (see below), whose sum is σ = 31244140583310. Its totient is φ = 8331770822208.

The previous prime is 16663541644417. The next prime is 16663541644433. The reversal of 16663541644424 is 42444614536661.

It can be written as a sum of positive squares in only one way, i.e., 16652781731524 + 10759912900 = 4080782^2 + 103730^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 16663541644424.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1041471352769 + ... + 1041471352784.

Almost surely, 2^{16663541644424} is an apocalyptic number.

It is an amenable number.

16663541644424 is a deficient number, since it is larger than the sum of its proper divisors (14580598938886).

16663541644424 is a wasteful number, since it uses less digits than its factorization.

16663541644424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2082942705559 (or 2082942705555 counting only the distinct ones).

The product of its digits is 39813120, while the sum is 56.

The spelling of 16663541644424 in words is "sixteen trillion, six hundred sixty-three billion, five hundred forty-one million, six hundred forty-four thousand, four hundred twenty-four".