201001166 has 16 divisors (see below), whose sum is σ = 320280480. Its totient is φ = 94279680.

The previous prime is 201001159. The next prime is 201001181. The reversal of 201001166 is 661100102.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1070 + ... + 20078.

It is an arithmetic number, because the mean of its divisors is an integer number (20017530).

Almost surely, 2^201001166 is an apocalyptic number.

201001166 is a deficient number, since it is larger than the sum of its proper divisors (119279314).

201001166 is a wasteful number, since it uses less digits than its factorization.

201001166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19339.

The product of its (nonzero) digits is 72, while the sum is 17.

The square root of 201001166 is about 14177.4880003476. The cubic root of 201001166 is about 585.7777329586. Note that the first 4 decimals are identical.

Adding to 201001166 its reverse (661100102), we get a palindrome (862101268).

The spelling of 201001166 in words is "two hundred one million, one thousand, one hundred sixty-six".