16666553220244 has 12 divisors (see below), whose sum is σ = 29166538665600. Its totient is φ = 8333256458648.

The previous prime is 16666553220221. The next prime is 16666553220253. The reversal of 16666553220244 is 44202235566661.

It is a junction number, because it is equal to n+sod(n) for n = 16666553220191 and 16666553220200.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3093604 + ... + 6550075.

It is an arithmetic number, because the mean of its divisors is an integer number (2430544888800).

Almost surely, 2^{16666553220244} is an apocalyptic number.

It is an amenable number.

16666553220244 is a deficient number, since it is larger than the sum of its proper divisors (12499985445356).

16666553220244 is a wasteful number, since it uses less digits than its factorization.

16666553220244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10075742 (or 10075740 counting only the distinct ones).

The product of its (nonzero) digits is 12441600, while the sum is 52.

The spelling of 16666553220244 in words is "sixteen trillion, six hundred sixty-six billion, five hundred fifty-three million, two hundred twenty thousand, two hundred forty-four".