6686397 has 12 divisors (see below), whose sum is σ = 9775584. Its totient is φ = 4403400.

The previous prime is 6686363. The next prime is 6686413. The reversal of 6686397 is 7936866.

6686397 is a `hidden beast` number, since 6 + 6 + 8 + 639 + 7 = 666.

It is not a de Polignac number, because 6686397 - 2⁶ = 6686333 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6686357) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3729 + ... + 5222.

It is an arithmetic number, because the mean of its divisors is an integer number (814632).

Almost surely, 2^6686397 is an apocalyptic number.

It is an amenable number.

6686397 is a deficient number, since it is larger than the sum of its proper divisors (3089187).

6686397 is a wasteful number, since it uses less digits than its factorization.

6686397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9040 (or 9037 counting only the distinct ones).

The product of its digits is 326592, while the sum is 45.

The square root of 6686397 is about 2585.8068373334. The cubic root of 6686397 is about 188.3926924560.

The spelling of 6686397 in words is "six million, six hundred eighty-six thousand, three hundred ninety-seven".