133665700 has 72 divisors (see below), whose sum is σ = 333228672. Its totient is φ = 45588480.

The previous prime is 133665677. The next prime is 133665733. The reversal of 133665700 is 7566331.

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, 179529 + ... + 180271.

It is an arithmetic number, because the mean of its divisors is an integer number (4628176).

Almost surely, 2^133665700 is an apocalyptic number.

133665700 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 133665700, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (166614336).

133665700 is an abundant number, since it is smaller than the sum of its proper divisors (199562972).

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

133665700 is a wasteful number, since it uses less digits than its factorization.

133665700 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1021 (or 1014 counting only the distinct ones).

The product of its (nonzero) digits is 11340, while the sum is 31.

The square root of 133665700 is about 11561.3883249375. The cubic root of 133665700 is about 511.2970955513.

The spelling of 133665700 in words is "one hundred thirty-three million, six hundred sixty-five thousand, seven hundred".