6638733 has 16 divisors (see below), whose sum is σ = 10353600. Its totient is φ = 4192560.

The previous prime is 6638701. The next prime is 6638741. The reversal of 6638733 is 3378366.

It is not a de Polignac number, because 6638733 - 2⁵ = 6638701 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6638773) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5958 + ... + 6983.

It is an arithmetic number, because the mean of its divisors is an integer number (647100).

Almost surely, 2^6638733 is an apocalyptic number.

It is an amenable number.

6638733 is a deficient number, since it is larger than the sum of its proper divisors (3714867).

6638733 is a wasteful number, since it uses less digits than its factorization.

6638733 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12969 (or 12963 counting only the distinct ones).

The product of its digits is 54432, while the sum is 36.

The square root of 6638733 is about 2576.5738879372. The cubic root of 6638733 is about 187.9439719113.

The spelling of 6638733 in words is "six million, six hundred thirty-eight thousand, seven hundred thirty-three".