565660 has 12 divisors (see below), whose sum is σ = 1187928. Its totient is φ = 226256.

The previous prime is 565651. The next prime is 565661. The reversal of 565660 is 66565.

565660 = T₁₇₉ + T₁₈₀ + ... + T₂₀₈.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (565661) 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, 14122 + ... + 14161.

It is an arithmetic number, because the mean of its divisors is an integer number (98994).

2⁵⁶⁵⁶⁶⁰ is an apocalyptic number.

It is an amenable number.

565660 is an abundant number, since it is smaller than the sum of its proper divisors (622268).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

565660 is a wasteful number, since it uses less digits than its factorization.

565660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28292 (or 28290 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 28.

The square root of 565660 is about 752.1037162520. The cubic root of 565660 is about 82.7024717714.

It can be divided in two parts, 565 and 660, that added together give a triangular number (1225 = T₄₉).

The spelling of 565660 in words is "five hundred sixty-five thousand, six hundred sixty".