660943 has 6 divisors (see below), whose sum is σ = 702416. Its totient is φ = 621792.

The previous prime is 660941. The next prime is 660949. The reversal of 660943 is 349066.

It is not a de Polignac number, because 660943 - 2¹ = 660941 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (660941) 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 5 ways as a sum of consecutive naturals, for example, 855 + ... + 1432.

2⁶⁶⁰⁹⁴³ is an apocalyptic number.

660943 is a deficient number, since it is larger than the sum of its proper divisors (41473).

660943 is a wasteful number, since it uses less digits than its factorization.

660943 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2321 (or 2304 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 28.

The square root of 660943 is about 812.9840096828. The cubic root of 660943 is about 87.1073234018.

The spelling of 660943 in words is "six hundred sixty thousand, nine hundred forty-three".