201166011 has 20 divisors (see below), whose sum is σ = 310873200. Its totient is φ = 129484656.

The previous prime is 201165949. The next prime is 201166013. The reversal of 201166011 is 110661102.

201166011 is a `hidden beast` number, since 2 + 0 + 1 + 1 + 660 + 1 + 1 = 666.

It is not a de Polignac number, because 201166011 - 2⁷ = 201165883 is a prime.

It is not an unprimeable number, because it can be changed into a prime (201166013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 40471 + ... + 45168.

It is an arithmetic number, because the mean of its divisors is an integer number (15543660).

Almost surely, 2^201166011 is an apocalyptic number.

201166011 is a deficient number, since it is larger than the sum of its proper divisors (109707189).

201166011 is an equidigital number, since it uses as much as digits as its factorization.

201166011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85680 (or 85671 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

The square root of 201166011 is about 14183.3004269105. The cubic root of 201166011 is about 585.9378251390.

The spelling of 201166011 in words is "two hundred one million, one hundred sixty-six thousand, eleven".