663020563 has 6 divisors (see below), whose sum is σ = 693101444. Its totient is φ = 634193076.

The previous prime is 663020549. The next prime is 663020629. The reversal of 663020563 is 365020366.

It is not a de Polignac number, because 663020563 - 2⁵ = 663020531 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (663020503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 626145 + ... + 627202.

Almost surely, 2^663020563 is an apocalyptic number.

663020563 is a deficient number, since it is larger than the sum of its proper divisors (30080881).

663020563 is a wasteful number, since it uses less digits than its factorization.

663020563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1253393 (or 1253370 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 31.

The square root of 663020563 is about 25749.1856764442. The cubic root of 663020563 is about 871.9849700542.

The spelling of 663020563 in words is "six hundred sixty-three million, twenty thousand, five hundred sixty-three".