6694638 has 8 divisors (see below), whose sum is σ = 13389288. Its totient is φ = 2231544.

The previous prime is 6694561. The next prime is 6694643. The reversal of 6694638 is 8364966.

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

6694638 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 6694638.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 557881 + ... + 557892.

It is an arithmetic number, because the mean of its divisors is an integer number (1673661).

Almost surely, 2^6694638 is an apocalyptic number.

6694638 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

6694638 is a wasteful number, since it uses less digits than its factorization.

6694638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1115778.

The product of its digits is 186624, while the sum is 42.

The square root of 6694638 is about 2587.3998531344. The cubic root of 6694638 is about 188.4700588252.

The spelling of 6694638 in words is "six million, six hundred ninety-four thousand, six hundred thirty-eight".