6686398 has 8 divisors (see below), whose sum is σ = 10057608. Its totient is φ = 3333864.

The previous prime is 6686363. The next prime is 6686413. The reversal of 6686398 is 8936866.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3736 + ... + 5227.

It is an arithmetic number, because the mean of its divisors is an integer number (1257201).

Almost surely, 2^6686398 is an apocalyptic number.

6686398 is a deficient number, since it is larger than the sum of its proper divisors (3371210).

6686398 is a wasteful number, since it uses less digits than its factorization.

6686398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9338.

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

The square root of 6686398 is about 2585.8070306966. The cubic root of 6686398 is about 188.3927018478.

The spelling of 6686398 in words is "six million, six hundred eighty-six thousand, three hundred ninety-eight".