6653656789 has 16 divisors (see below), whose sum is σ = 7416702720. Its totient is φ = 5926737600.

The previous prime is 6653656781. The next prime is 6653656853. The reversal of 6653656789 is 9876563566.

It is a happy number.

6653656789 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 6653656789 - 2³ = 6653656781 is a prime.

It is a super-2 number, since 2×6653656789² = 88542297331611581042, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6653656781) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 882574 + ... + 890080.

It is an arithmetic number, because the mean of its divisors is an integer number (463543920).

Almost surely, 2^6653656789 is an apocalyptic number.

It is an amenable number.

6653656789 is a deficient number, since it is larger than the sum of its proper divisors (763045931).

6653656789 is a wasteful number, since it uses less digits than its factorization.

6653656789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9900.

The product of its digits is 48988800, while the sum is 61.

The square root of 6653656789 is about 81569.9502819513. The cubic root of 6653656789 is about 1880.8469841517.

The spelling of 6653656789 in words is "six billion, six hundred fifty-three million, six hundred fifty-six thousand, seven hundred eighty-nine".