6619990563 has 24 divisors (see below), whose sum is σ = 9644457888. Its totient is φ = 4375450752.

The previous prime is 6619990541. The next prime is 6619990577. The reversal of 6619990563 is 3650999166.

It is a happy number.

6619990563 is a `hidden beast` number, since 66 + 19 + 9 + 9 + 0 + 563 = 666.

It is not a de Polignac number, because 6619990563 - 2⁶ = 6619990499 is a prime.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (6619990063) 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 23 ways as a sum of consecutive naturals, for example, 1090645 + ... + 1096697.

It is an arithmetic number, because the mean of its divisors is an integer number (401852412).

Almost surely, 2^6619990563 is an apocalyptic number.

6619990563 is a deficient number, since it is larger than the sum of its proper divisors (3024467325).

6619990563 is a wasteful number, since it uses less digits than its factorization.

6619990563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7083 (or 7080 counting only the distinct ones).

The product of its (nonzero) digits is 2361960, while the sum is 54.

The square root of 6619990563 is about 81363.3244342929. The cubic root of 6619990563 is about 1877.6693771967.

The spelling of 6619990563 in words is "six billion, six hundred nineteen million, nine hundred ninety thousand, five hundred sixty-three".