665118732 has 12 divisors (see below), whose sum is σ = 1551943736. Its totient is φ = 221706240.

The previous prime is 665118721. The next prime is 665118737. The reversal of 665118732 is 237811566.

It is a tau number, because it is divible by the number of its divisors (12).

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (665118737) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27713269 + ... + 27713292.

Almost surely, 2^665118732 is an apocalyptic number.

It is an amenable number.

665118732 is an abundant number, since it is smaller than the sum of its proper divisors (886825004).

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

665118732 is a wasteful number, since it uses less digits than its factorization.

665118732 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55426568 (or 55426566 counting only the distinct ones).

The product of its digits is 60480, while the sum is 39.

The square root of 665118732 is about 25789.8959284445. The cubic root of 665118732 is about 872.9038180206.

The spelling of 665118732 in words is "six hundred sixty-five million, one hundred eighteen thousand, seven hundred thirty-two".