201666161616652 has 24 divisors (see below), whose sum is σ = 365087782956960. Its totient is φ = 97355413921920.

The previous prime is 201666161616649. The next prime is 201666161616677. The reversal of 201666161616652 is 256616161666102.

201666161616652 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 201666161616593 and 201666161616602.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11365777 + ... + 23076247.

It is an arithmetic number, because the mean of its divisors is an integer number (15211990956540).

Almost surely, 2^{201666161616652} is an apocalyptic number.

It is an amenable number.

201666161616652 is a deficient number, since it is larger than the sum of its proper divisors (163421621340308).

201666161616652 is a wasteful number, since it uses less digits than its factorization.

201666161616652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11858961 (or 11858959 counting only the distinct ones).

The product of its (nonzero) digits is 5598720, while the sum is 55.

The spelling of 201666161616652 in words is "two hundred one trillion, six hundred sixty-six billion, one hundred sixty-one million, six hundred sixteen thousand, six hundred fifty-two".