201552666 has 32 divisors (see below), whose sum is σ = 465174528. Its totient is φ = 57026160.

The previous prime is 201552647. The next prime is 201552677. The reversal of 201552666 is 666255102.

It is a happy number.

201552666 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18970 + ... + 27621.

It is an arithmetic number, because the mean of its divisors is an integer number (14536704).

Almost surely, 2^201552666 is an apocalyptic number.

201552666 is an abundant number, since it is smaller than the sum of its proper divisors (263621862).

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

201552666 is a wasteful number, since it uses less digits than its factorization.

201552666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46706.

The product of its (nonzero) digits is 21600, while the sum is 33.

The square root of 201552666 is about 14196.9245261078. The cubic root of 201552666 is about 586.3129892327.

The spelling of 201552666 in words is "two hundred one million, five hundred fifty-two thousand, six hundred sixty-six".