664073265 has 8 divisors (see below), whose sum is σ = 1062517248. Its totient is φ = 354172400.

The previous prime is 664073257. The next prime is 664073281. The reversal of 664073265 is 562370466.

664073265 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 664073265 - 2³ = 664073257 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22135761 + ... + 22135790.

It is an arithmetic number, because the mean of its divisors is an integer number (132814656).

Almost surely, 2^664073265 is an apocalyptic number.

It is an amenable number.

664073265 is a deficient number, since it is larger than the sum of its proper divisors (398443983).

664073265 is a wasteful number, since it uses less digits than its factorization.

664073265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44271559.

The product of its (nonzero) digits is 181440, while the sum is 39.

The square root of 664073265 is about 25769.6190309442. The cubic root of 664073265 is about 872.4462201699.

The spelling of 664073265 in words is "six hundred sixty-four million, seventy-three thousand, two hundred sixty-five".