665073273 has 16 divisors (see below), whose sum is σ = 898551360. Its totient is φ = 437502144.

The previous prime is 665073263. The next prime is 665073293. The reversal of 665073273 is 372370566.

It is not a de Polignac number, because 665073273 - 2⁶ = 665073209 is a prime.

It is not an unprimeable number, because it can be changed into a prime (665073223) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 370863 + ... + 372651.

It is an arithmetic number, because the mean of its divisors is an integer number (56159460).

Almost surely, 2^665073273 is an apocalyptic number.

It is an amenable number.

665073273 is a deficient number, since it is larger than the sum of its proper divisors (233478087).

665073273 is a wasteful number, since it uses less digits than its factorization.

665073273 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3368.

The product of its (nonzero) digits is 158760, while the sum is 39.

The square root of 665073273 is about 25789.0145798555. The cubic root of 665073273 is about 872.8839307248.

The spelling of 665073273 in words is "six hundred sixty-five million, seventy-three thousand, two hundred seventy-three".