665266132 has 24 divisors (see below), whose sum is σ = 1175874560. Its totient is φ = 329313600.

The previous prime is 665266079. The next prime is 665266139. The reversal of 665266132 is 231662566.

It is a junction number, because it is equal to n+sod(n) for n = 665266091 and 665266100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (665266139) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 304219 + ... + 306397.

Almost surely, 2^665266132 is an apocalyptic number.

It is an amenable number.

665266132 is a deficient number, since it is larger than the sum of its proper divisors (510608428).

665266132 is a wasteful number, since it uses less digits than its factorization.

665266132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2911 (or 2909 counting only the distinct ones).

The product of its digits is 77760, while the sum is 37.

The square root of 665266132 is about 25792.7534784482. The cubic root of 665266132 is about 872.9682959917.

The spelling of 665266132 in words is "six hundred sixty-five million, two hundred sixty-six thousand, one hundred thirty-two".