665304216 has 16 divisors (see below), whose sum is σ = 1663260600. Its totient is φ = 221768064.

The previous prime is 665304203. The next prime is 665304217. The reversal of 665304216 is 612403566.

It is a hoax number, since the sum of its digits (33) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (665304217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13860481 + ... + 13860528.

Almost surely, 2^665304216 is an apocalyptic number.

It is an amenable number.

665304216 is an abundant number, since it is smaller than the sum of its proper divisors (997956384).

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

665304216 is a wasteful number, since it uses less digits than its factorization.

665304216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27721018 (or 27721014 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 33.

The square root of 665304216 is about 25793.4917372581. The cubic root of 665304216 is about 872.9849537314.

The spelling of 665304216 in words is "six hundred sixty-five million, three hundred four thousand, two hundred sixteen".