664223416 has 16 divisors (see below), whose sum is σ = 1266528600. Its totient is φ = 326482464.

The previous prime is 664223393. The next prime is 664223419. The reversal of 664223416 is 614322466.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664223419) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 703155 + ... + 704098.

Almost surely, 2^664223416 is an apocalyptic number.

It is an amenable number.

664223416 is a deficient number, since it is larger than the sum of its proper divisors (602305184).

664223416 is a wasteful number, since it uses less digits than its factorization.

664223416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1407318 (or 1407314 counting only the distinct ones).

The product of its digits is 41472, while the sum is 34.

The square root of 664223416 is about 25772.5321999993. The cubic root of 664223416 is about 872.5119703450.

The spelling of 664223416 in words is "six hundred sixty-four million, two hundred twenty-three thousand, four hundred sixteen".