560661 has 8 divisors (see below), whose sum is σ = 767904. Its totient is φ = 363600.

The previous prime is 560653. The next prime is 560669. The reversal of 560661 is 166065.

It is an interprime number because it is at equal distance from previous prime (560653) and next prime (560669).

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

It is not a de Polignac number, because 560661 - 2³ = 560653 is a prime.

It is a Smith number, since the sum of its digits (24) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

560661 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (560669) 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, 2415 + ... + 2636.

It is an arithmetic number, because the mean of its divisors is an integer number (95988).

2⁵⁶⁰⁶⁶¹ is an apocalyptic number.

It is an amenable number.

560661 is a deficient number, since it is larger than the sum of its proper divisors (207243).

560661 is a wasteful number, since it uses less digits than its factorization.

560661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5091.

The product of its (nonzero) digits is 1080, while the sum is 24.

The square root of 560661 is about 748.7729963080. The cubic root of 560661 is about 82.4581238349.

It can be divided in two parts, 560 and 661, that added together give a palindrome (1221).

The spelling of 560661 in words is "five hundred sixty thousand, six hundred sixty-one".