6638123330 has 16 divisors (see below), whose sum is σ = 12174068664. Its totient is φ = 2605150080.

The previous prime is 6638123299. The next prime is 6638123353. The reversal of 6638123330 is 333218366.

6638123330 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 4270230409 + 2367892921 = 65347^2 + 48661^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6261851 + ... + 6262910.

Almost surely, 2^6638123330 is an apocalyptic number.

6638123330 is a deficient number, since it is larger than the sum of its proper divisors (5535945334).

6638123330 is a wasteful number, since it uses less digits than its factorization.

6638123330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12524821.

The product of its (nonzero) digits is 46656, while the sum is 35.

The square root of 6638123330 is about 81474.6790727033. The cubic root of 6638123330 is about 1879.3821843849.

The spelling of 6638123330 in words is "six billion, six hundred thirty-eight million, one hundred twenty-three thousand, three hundred thirty".