664228244 has 6 divisors (see below), whose sum is σ = 1162399434. Its totient is φ = 332114120.

The previous prime is 664228231. The next prime is 664228307. The reversal of 664228244 is 442822466.

664228244 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 663680644 + 547600 = 25762^2 + 740^2 .

It is a junction number, because it is equal to n+sod(n) for n = 664228198 and 664228207.

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, 83028527 + ... + 83028534.

It is an arithmetic number, because the mean of its divisors is an integer number (193733239).

Almost surely, 2^664228244 is an apocalyptic number.

It is an amenable number.

664228244 is a deficient number, since it is larger than the sum of its proper divisors (498171190).

664228244 is a wasteful number, since it uses less digits than its factorization.

664228244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166057065 (or 166057063 counting only the distinct ones).

The product of its digits is 147456, while the sum is 38.

The square root of 664228244 is about 25772.6258654410. The cubic root of 664228244 is about 872.5140843313.

The spelling of 664228244 in words is "six hundred sixty-four million, two hundred twenty-eight thousand, two hundred forty-four".