6668938 has 8 divisors (see below), whose sum is σ = 10047780. Its totient is φ = 3319680.

The previous prime is 6668911. The next prime is 6668939. The reversal of 6668938 is 8398666.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 5212089 + 1456849 = 2283^2 + 1207^2 .

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

It is not an unprimeable number, because it can be changed into a prime (6668939) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6823 + ... + 7738.

Almost surely, 2^6668938 is an apocalyptic number.

6668938 is a deficient number, since it is larger than the sum of its proper divisors (3378842).

6668938 is a wasteful number, since it uses less digits than its factorization.

6668938 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14792.

The product of its digits is 373248, while the sum is 46.

The square root of 6668938 is about 2582.4287018232. The cubic root of 6668938 is about 188.2285774143.

It can be divided in two parts, 666 and 8938, that added together give a square (9604 = 98²).

The spelling of 6668938 in words is "six million, six hundred sixty-eight thousand, nine hundred thirty-eight".