660243 has 8 divisors (see below), whose sum is σ = 910800. Its totient is φ = 424928.

The previous prime is 660241. The next prime is 660251. The reversal of 660243 is 342066.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 660243 - 2¹ = 660241 is a prime.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 660243.

It is not an unprimeable number, because it can be changed into a prime (660241) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3708 + ... + 3881.

It is an arithmetic number, because the mean of its divisors is an integer number (113850).

2⁶⁶⁰²⁴³ is an apocalyptic number.

660243 is a deficient number, since it is larger than the sum of its proper divisors (250557).

660243 is a wasteful number, since it uses less digits than its factorization.

660243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7621.

The product of its (nonzero) digits is 864, while the sum is 21.

The square root of 660243 is about 812.5533828617. The cubic root of 660243 is about 87.0765609582.

It can be divided in two parts, 660 and 243, that added together give a triangular number (903 = T₄₂).

The spelling of 660243 in words is "six hundred sixty thousand, two hundred forty-three".