660224 has 18 divisors (see below), whose sum is σ = 1318380. Its totient is φ = 329984.

The previous prime is 660217. The next prime is 660227. The reversal of 660224 is 422066.

It is a d-powerful number, because it can be written as 6⁷ + 6⁷ + 2¹¹ + 0 + 2¹⁵ + 4⁸ .

It is a junction number, because it is equal to n+sod(n) for n = 660196 and 660205.

It is not an unprimeable number, because it can be changed into a prime (660227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1034 + ... + 1545.

2⁶⁶⁰²²⁴ is an apocalyptic number.

660224 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

660224 is a deficient number, since it is larger than the sum of its proper divisors (658156).

660224 is an equidigital number, since it uses as much as digits as its factorization.

660224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2595 (or 2581 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 660224 is about 812.5416912381. The cubic root of 660224 is about 87.0757256746.

The spelling of 660224 in words is "six hundred sixty thousand, two hundred twenty-four".