660843 has 12 divisors (see below), whose sum is σ = 965328. Its totient is φ = 435600.

The previous prime is 660833. The next prime is 660851. The reversal of 660843 is 348066.

660843 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 660843 - 2⁵ = 660811 is a prime.

It is not an unprimeable number, because it can be changed into a prime (660833) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 546 + ... + 1272.

It is an arithmetic number, because the mean of its divisors is an integer number (80444).

2⁶⁶⁰⁸⁴³ is an apocalyptic number.

660843 is a deficient number, since it is larger than the sum of its proper divisors (304485).

660843 is a wasteful number, since it uses less digits than its factorization.

660843 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 834 (or 831 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 660843 is about 812.9225055317. The cubic root of 660843 is about 87.1029300972.

The spelling of 660843 in words is "six hundred sixty thousand, eight hundred forty-three".