660563 has 2 divisors, whose sum is σ = 660564. Its totient is φ = 660562.

The previous prime is 660559. The next prime is 660589. The reversal of 660563 is 365066.

It is an a-pointer prime, because the next prime (660589) can be obtained adding 660563 to its sum of digits (26).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 660563 - 2² = 660559 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (660503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 330281 + 330282.

It is an arithmetic number, because the mean of its divisors is an integer number (330282).

2⁶⁶⁰⁵⁶³ is an apocalyptic number.

660563 is a deficient number, since it is larger than the sum of its proper divisors (1).

660563 is an equidigital number, since it uses as much as digits as its factorization.

660563 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3240, while the sum is 26.

The square root of 660563 is about 812.7502691479. The cubic root of 660563 is about 87.0906264861.

It can be divided in two parts, 6 and 60563, that multiplied together give a triangular number (363378 = T₈₅₂).

The spelling of 660563 in words is "six hundred sixty thousand, five hundred sixty-three".