6638916 has 24 divisors (see below), whose sum is σ = 15755040. Its totient is φ = 2175232.

The previous prime is 6638911. The next prime is 6638953. The reversal of 6638916 is 6198366.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (6638911) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3981 + ... + 5396.

It is an arithmetic number, because the mean of its divisors is an integer number (656460).

Almost surely, 2^6638916 is an apocalyptic number.

It is an amenable number.

6638916 is an abundant number, since it is smaller than the sum of its proper divisors (9116124).

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

6638916 is a wasteful number, since it uses less digits than its factorization.

6638916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9443 (or 9441 counting only the distinct ones).

The product of its digits is 46656, while the sum is 39.

The square root of 6638916 is about 2576.6093999673. The cubic root of 6638916 is about 187.9456988187.

The spelling of 6638916 in words is "six million, six hundred thirty-eight thousand, nine hundred sixteen".