201665016 has 96 divisors (see below), whose sum is σ = 660947040. Its totient is φ = 54226944.

The previous prime is 201665003. The next prime is 201665021. The reversal of 201665016 is 610566102.

It is a happy number.

201665016 is a `hidden beast` number, since 2 + 0 + 1 + 6 + 650 + 1 + 6 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3201 + ... + 20336.

It is an arithmetic number, because the mean of its divisors is an integer number (6884865).

Almost surely, 2^201665016 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 201665016, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (330473520).

201665016 is an abundant number, since it is smaller than the sum of its proper divisors (459282024).

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

201665016 is a wasteful number, since it uses less digits than its factorization.

201665016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23573 (or 23566 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 201665016 is about 14200.8808177521. The cubic root of 201665016 is about 586.4219103564.

The spelling of 201665016 in words is "two hundred one million, six hundred sixty-five thousand, sixteen".