6648630789 has 16 divisors (see below), whose sum is σ = 8902864640. Its totient is φ = 4413450240.

The previous prime is 6648630761. The next prime is 6648630797. The reversal of 6648630789 is 9870368466.

It is a happy number.

It is not a de Polignac number, because 6648630789 - 2⁷ = 6648630661 is a prime.

It is a Smith number, since the sum of its digits (57) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6648630389) 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, 703284 + ... + 712674.

It is an arithmetic number, because the mean of its divisors is an integer number (556429040).

Almost surely, 2^6648630789 is an apocalyptic number.

It is an amenable number.

6648630789 is a deficient number, since it is larger than the sum of its proper divisors (2254233851).

6648630789 is a wasteful number, since it uses less digits than its factorization.

6648630789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10380.

The product of its (nonzero) digits is 10450944, while the sum is 57.

The square root of 6648630789 is about 81539.1365480405. The cubic root of 6648630789 is about 1880.3732838262.

The spelling of 6648630789 in words is "six billion, six hundred forty-eight million, six hundred thirty thousand, seven hundred eighty-nine".