605660561 has 4 divisors (see below), whose sum is σ = 660720624. Its totient is φ = 550600500.

The previous prime is 605660557. The next prime is 605660591. The reversal of 605660561 is 165066506.

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 605660561 - 2² = 605660557 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (605660591) 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, 27530015 + ... + 27530036.

It is an arithmetic number, because the mean of its divisors is an integer number (165180156).

Almost surely, 2^605660561 is an apocalyptic number.

It is an amenable number.

605660561 is a deficient number, since it is larger than the sum of its proper divisors (55060063).

605660561 is a wasteful number, since it uses less digits than its factorization.

605660561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55060062.

The product of its (nonzero) digits is 32400, while the sum is 35.

The square root of 605660561 is about 24610.1719010656. The cubic root of 605660561 is about 846.0767576554.

It can be divided in two parts, 605 and 660561, that added together give a palindrome (661166).

The spelling of 605660561 in words is "six hundred five million, six hundred sixty thousand, five hundred sixty-one".