665204072 has 32 divisors (see below), whose sum is σ = 1344470400. Its totient is φ = 306727104.

The previous prime is 665204047. The next prime is 665204077. The reversal of 665204072 is 270402566.

665204072 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (665204077) 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, 139829 + ... + 144507.

It is an arithmetic number, because the mean of its divisors is an integer number (42014700).

Almost surely, 2^665204072 is an apocalyptic number.

It is an amenable number.

665204072 is an abundant number, since it is smaller than the sum of its proper divisors (679266328).

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

665204072 is a wasteful number, since it uses less digits than its factorization.

665204072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6065 (or 6061 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 32.

The square root of 665204072 is about 25791.5503993071. The cubic root of 665204072 is about 872.9411499146.

The spelling of 665204072 in words is "six hundred sixty-five million, two hundred four thousand, seventy-two".