660446 has 16 divisors (see below), whose sum is σ = 1047600. Its totient is φ = 311808.

The previous prime is 660409. The next prime is 660449. The reversal of 660446 is 644066.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (660449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3326 + ... + 3518.

It is an arithmetic number, because the mean of its divisors is an integer number (65475).

2⁶⁶⁰⁴⁴⁶ is an apocalyptic number.

660446 is a deficient number, since it is larger than the sum of its proper divisors (387154).

660446 is a wasteful number, since it uses less digits than its factorization.

660446 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 283.

The product of its (nonzero) digits is 3456, while the sum is 26.

The square root of 660446 is about 812.6782881313. The cubic root of 660446 is about 87.0854843044.

The spelling of 660446 in words is "six hundred sixty thousand, four hundred forty-six".