665223244 has 24 divisors (see below), whose sum is σ = 1361389568. Its totient is φ = 278465040.

The previous prime is 665223217. The next prime is 665223263. The reversal of 665223244 is 442322566.

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, 275052 + ... + 277459.

Almost surely, 2^665223244 is an apocalyptic number.

It is an amenable number.

665223244 is an abundant number, since it is smaller than the sum of its proper divisors (696166324).

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

665223244 is a wasteful number, since it uses less digits than its factorization.

665223244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 552565 (or 552563 counting only the distinct ones).

The product of its digits is 69120, while the sum is 34.

The square root of 665223244 is about 25791.9220687408. The cubic root of 665223244 is about 872.9495362468.

The spelling of 665223244 in words is "six hundred sixty-five million, two hundred twenty-three thousand, two hundred forty-four".