6598621663 has 16 divisors (see below), whose sum is σ = 6987052800. Its totient is φ = 6214423680.

The previous prime is 6598621661. The next prime is 6598621669. The reversal of 6598621663 is 3661268956.

It is a cyclic number.

It is not a de Polignac number, because 6598621663 - 2¹ = 6598621661 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 6598621663.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6598621661) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2557308 + ... + 2559886.

It is an arithmetic number, because the mean of its divisors is an integer number (436690800).

Almost surely, 2^6598621663 is an apocalyptic number.

6598621663 is a deficient number, since it is larger than the sum of its proper divisors (388431137).

6598621663 is a wasteful number, since it uses less digits than its factorization.

6598621663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3342.

The product of its digits is 2799360, while the sum is 52.

The square root of 6598621663 is about 81231.9005255940. The cubic root of 6598621663 is about 1875.6468678178.

The spelling of 6598621663 in words is "six billion, five hundred ninety-eight million, six hundred twenty-one thousand, six hundred sixty-three".