6638367 has 8 divisors (see below), whose sum is σ = 8866480. Its totient is φ = 4417920.

The previous prime is 6638363. The next prime is 6638369. The reversal of 6638367 is 7638366.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 6638367 - 2² = 6638363 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6638363) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 567 + ... + 3687.

It is an arithmetic number, because the mean of its divisors is an integer number (1108310).

Almost surely, 2^6638367 is an apocalyptic number.

6638367 is a deficient number, since it is larger than the sum of its proper divisors (2228113).

6638367 is a wasteful number, since it uses less digits than its factorization.

6638367 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3833.

The product of its digits is 108864, while the sum is 39.

The square root of 6638367 is about 2576.5028624087. The cubic root of 6638367 is about 187.9405180013.

Subtracting 6638367 from its reverse (7638366), we obtain a palindrome (999999).

The spelling of 6638367 in words is "six million, six hundred thirty-eight thousand, three hundred sixty-seven".