201133660 has 72 divisors (see below), whose sum is σ = 522770976. Its totient is φ = 63648000.

The previous prime is 201133657. The next prime is 201133679. The reversal of 201133660 is 66331102.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 19410 + ... + 27910.

It is an arithmetic number, because the mean of its divisors is an integer number (7260708).

Almost surely, 2^201133660 is an apocalyptic number.

201133660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 201133660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (261385488).

201133660 is an abundant number, since it is smaller than the sum of its proper divisors (321637316).

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

201133660 is a wasteful number, since it uses less digits than its factorization.

201133660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8543 (or 8528 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 22.

The square root of 201133660 is about 14182.1599201250. The cubic root of 201133660 is about 585.9064137843.

Adding to 201133660 its reverse (66331102), we get a palindrome (267464762).

The spelling of 201133660 in words is "two hundred one million, one hundred thirty-three thousand, six hundred sixty".