6638448366 has 64 divisors (see below), whose sum is σ = 16366060800. Its totient is φ = 1977544800.

The previous prime is 6638448359. The next prime is 6638448409.

6638448366 is nontrivially palindromic in base 10.

6638448366 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 59665 + ... + 129756.

It is an arithmetic number, because the mean of its divisors is an integer number (255719700).

Almost surely, 2^6638448366 is an apocalyptic number.

6638448366 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

6638448366 is an abundant number, since it is smaller than the sum of its proper divisors (9727612434).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6638448366 is a wasteful number, since it uses less digits than its factorization.

6638448366 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 189502 (or 189496 counting only the distinct ones).

The product of its digits is 11943936, while the sum is 54.

The square root of 6638448366 is about 81476.6737539033. The cubic root of 6638448366 is about 1879.4128585612.

The spelling of 6638448366 in words is "six billion, six hundred thirty-eight million, four hundred forty-eight thousand, three hundred sixty-six".