665552224 has 12 divisors (see below), whose sum is σ = 1310306004. Its totient is φ = 332776096.

The previous prime is 665552213. The next prime is 665552231. The reversal of 665552224 is 422255566.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10399222 + ... + 10399285.

It is an arithmetic number, because the mean of its divisors is an integer number (109192167).

Almost surely, 2^665552224 is an apocalyptic number.

It is an amenable number.

665552224 is a deficient number, since it is larger than the sum of its proper divisors (644753780).

665552224 is a wasteful number, since it uses less digits than its factorization.

665552224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20798517 (or 20798509 counting only the distinct ones).

The product of its digits is 144000, while the sum is 37.

The square root of 665552224 is about 25798.2988586457. The cubic root of 665552224 is about 873.0934155699.

The spelling of 665552224 in words is "six hundred sixty-five million, five hundred fifty-two thousand, two hundred twenty-four".