201066666 has 16 divisors (see below), whose sum is σ = 402293088. Its totient is φ = 66995600.

The previous prime is 201066661. The next prime is 201066739. The reversal of 201066666 is 666660102.

201066666 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

201066666 is a modest number, since divided by 66666 gives 2010 as remainder.

It is not an unprimeable number, because it can be changed into a prime (201066661) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15256 + ... + 25196.

It is an arithmetic number, because the mean of its divisors is an integer number (25143318).

Almost surely, 2^201066666 is an apocalyptic number.

201066666 is an abundant number, since it is smaller than the sum of its proper divisors (201226422).

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

201066666 is a wasteful number, since it uses less digits than its factorization.

201066666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13317.

The product of its (nonzero) digits is 15552, while the sum is 33.

The square root of 201066666 is about 14179.7978123808. The cubic root of 201066666 is about 585.8413549354.

The spelling of 201066666 in words is "two hundred one million, sixty-six thousand, six hundred sixty-six".