665534133 has 48 divisors (see below), whose sum is σ = 1111997952. Its totient is φ = 379728000.

The previous prime is 665534131. The next prime is 665534159. The reversal of 665534133 is 331435566.

665534133 is a `hidden beast` number, since 66 + 553 + 41 + 3 + 3 = 666.

It is not a de Polignac number, because 665534133 - 2¹ = 665534131 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (665534131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 110623 + ... + 116483.

It is an arithmetic number, because the mean of its divisors is an integer number (23166624).

Almost surely, 2^665534133 is an apocalyptic number.

It is an amenable number.

665534133 is a deficient number, since it is larger than the sum of its proper divisors (446463819).

665534133 is a wasteful number, since it uses less digits than its factorization.

665534133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5946 (or 5943 counting only the distinct ones).

The product of its digits is 97200, while the sum is 36.

The square root of 665534133 is about 25797.9482323692. The cubic root of 665534133 is about 873.0855047075.

Adding to 665534133 its reverse (331435566), we get a palindrome (996969699).

The spelling of 665534133 in words is "six hundred sixty-five million, five hundred thirty-four thousand, one hundred thirty-three".