660946 has 16 divisors (see below), whose sum is σ = 1165248. Its totient is φ = 277200.

The previous prime is 660941. The next prime is 660949. The reversal of 660946 is 649066.

It is a super-2 number, since 2×660946² = 873699229832, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (660941) by changing a digit.

660946 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 870 + ... + 1441.

It is an arithmetic number, because the mean of its divisors is an integer number (72828).

2⁶⁶⁰⁹⁴⁶ is an apocalyptic number.

660946 is a deficient number, since it is larger than the sum of its proper divisors (504302).

660946 is a wasteful number, since it uses less digits than its factorization.

660946 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2337.

The product of its (nonzero) digits is 7776, while the sum is 31.

The square root of 660946 is about 812.9858547355. The cubic root of 660946 is about 87.1074551941.

The spelling of 660946 in words is "six hundred sixty thousand, nine hundred forty-six".