133001660 has 48 divisors (see below), whose sum is σ = 306173952. Its totient is φ = 48129600.

The previous prime is 133001657. The next prime is 133001669. The reversal of 133001660 is 66100331.

133001660 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133001669) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 47705 + ... + 50415.

It is an arithmetic number, because the mean of its divisors is an integer number (6378624).

Almost surely, 2^133001660 is an apocalyptic number.

133001660 is a gapful number since it is divisible by the number (10) 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 133001660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (153086976).

133001660 is an abundant number, since it is smaller than the sum of its proper divisors (173172292).

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

133001660 is a wasteful number, since it uses less digits than its factorization.

133001660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2954 (or 2952 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 20.

The square root of 133001660 is about 11532.6345645737. The cubic root of 133001660 is about 510.4489958550.

Adding to 133001660 its reverse (66100331), we get a palindrome (199101991).

The spelling of 133001660 in words is "one hundred thirty-three million, one thousand, six hundred sixty".