580661 has 4 divisors (see below), whose sum is σ = 599424. Its totient is φ = 561900.

The previous prime is 580639. The next prime is 580663. The reversal of 580661 is 166085.

580661 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 580661 - 2¹⁰ = 579637 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 580661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (580663) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9335 + ... + 9396.

It is an arithmetic number, because the mean of its divisors is an integer number (149856).

2⁵⁸⁰⁶⁶¹ is an apocalyptic number.

It is an amenable number.

580661 is a deficient number, since it is larger than the sum of its proper divisors (18763).

580661 is a wasteful number, since it uses less digits than its factorization.

580661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18762.

The product of its (nonzero) digits is 1440, while the sum is 26.

The square root of 580661 is about 762.0111547740. The cubic root of 580661 is about 83.4271778344.

The spelling of 580661 in words is "five hundred eighty thousand, six hundred sixty-one".