666627244 has 12 divisors (see below), whose sum is σ = 1171693600. Its totient is φ = 331857648.

The previous prime is 666627223. The next prime is 666627257. The reversal of 666627244 is 442726666.

It is a self number, because there is not a number n which added to its sum of digits gives 666627244.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 362964 + ... + 364795.

Almost surely, 2^666627244 is an apocalyptic number.

It is an amenable number.

666627244 is a deficient number, since it is larger than the sum of its proper divisors (505066356).

666627244 is a wasteful number, since it uses less digits than its factorization.

666627244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 727992 (or 727990 counting only the distinct ones).

The product of its digits is 580608, while the sum is 43.

The square root of 666627244 is about 25819.1255467725. The cubic root of 666627244 is about 873.5632449611.

The spelling of 666627244 in words is "six hundred sixty-six million, six hundred twenty-seven thousand, two hundred forty-four".