663563 has 2 divisors, whose sum is σ = 663564. Its totient is φ = 663562.

The previous prime is 663557. The next prime is 663569. The reversal of 663563 is 365366.

It is a balanced prime because it is at equal distance from previous prime (663557) and next prime (663569).

It is a cyclic number.

It is not a de Polignac number, because 663563 - 2⁴ = 663547 is a prime.

It is not a weakly prime, because it can be changed into another prime (663569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 331781 + 331782.

It is an arithmetic number, because the mean of its divisors is an integer number (331782).

2⁶⁶³⁵⁶³ is an apocalyptic number.

663563 is a deficient number, since it is larger than the sum of its proper divisors (1).

663563 is an equidigital number, since it uses as much as digits as its factorization.

663563 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9720, while the sum is 29.

The square root of 663563 is about 814.5937637866. The cubic root of 663563 is about 87.2222704249. Note that the first 4 decimals are identical.

The spelling of 663563 in words is "six hundred sixty-three thousand, five hundred sixty-three".