133136665 has 8 divisors (see below), whose sum is σ = 163163520. Its totient is φ = 104242992.

The previous prime is 133136659. The next prime is 133136669. The reversal of 133136665 is 566631331.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 133136665 - 2⁹ = 133136153 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 133136665.

It is not an unprimeable number, because it can be changed into a prime (133136669) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 283035 + ... + 283504.

It is an arithmetic number, because the mean of its divisors is an integer number (20395440).

Almost surely, 2^133136665 is an apocalyptic number.

It is an amenable number.

133136665 is a deficient number, since it is larger than the sum of its proper divisors (30026855).

133136665 is an equidigital number, since it uses as much as digits as its factorization.

133136665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 566591.

The product of its digits is 29160, while the sum is 34.

The square root of 133136665 is about 11538.4862525376. The cubic root of 133136665 is about 510.6216499977.

Adding to 133136665 its reverse (566631331), we get a palindrome (699767996).

The spelling of 133136665 in words is "one hundred thirty-three million, one hundred thirty-six thousand, six hundred sixty-five".