201666252 has 12 divisors (see below), whose sum is σ = 470554616. Its totient is φ = 67222080.

The previous prime is 201666251. The next prime is 201666263. The reversal of 201666252 is 252666102.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (201666251) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8402749 + ... + 8402772.

Almost surely, 2^201666252 is an apocalyptic number.

It is an amenable number.

201666252 is an abundant number, since it is smaller than the sum of its proper divisors (268888364).

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

201666252 is a wasteful number, since it uses less digits than its factorization.

201666252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16805528 (or 16805526 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 30.

The square root of 201666252 is about 14200.9243361128. The cubic root of 201666252 is about 586.4231084092.

The spelling of 201666252 in words is "two hundred one million, six hundred sixty-six thousand, two hundred fifty-two".