665032018 has 12 divisors (see below), whose sum is σ = 1160413182. Its totient is φ = 285013680.

The previous prime is 665032003. The next prime is 665032019. The reversal of 665032018 is 810230566.

665032018 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 333537169 + 331494849 = 18263^2 + 18207^2 .

It is not an unprimeable number, because it can be changed into a prime (665032019) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3392923 + ... + 3393118.

Almost surely, 2^665032018 is an apocalyptic number.

665032018 is a deficient number, since it is larger than the sum of its proper divisors (495381164).

665032018 is a wasteful number, since it uses less digits than its factorization.

665032018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6786057 (or 6786050 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 665032018 is about 25788.2147113754. The cubic root of 665032018 is about 872.8658818007.

The spelling of 665032018 in words is "six hundred sixty-five million, thirty-two thousand, eighteen".