6686597 has 4 divisors (see below), whose sum is σ = 6692640. Its totient is φ = 6680556.

The previous prime is 6686591. The next prime is 6686611. The reversal of 6686597 is 7956866.

6686597 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 7956866 = 2 ⋅3978433.

It is a cyclic number.

It is not a de Polignac number, because 6686597 - 2⁸ = 6686341 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 (6686591) 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, 833 + ... + 3750.

It is an arithmetic number, because the mean of its divisors is an integer number (1673160).

Almost surely, 2^6686597 is an apocalyptic number.

It is an amenable number.

6686597 is a deficient number, since it is larger than the sum of its proper divisors (6043).

6686597 is a wasteful number, since it uses less digits than its factorization.

6686597 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6042.

The product of its digits is 544320, while the sum is 47.

The square root of 6686597 is about 2585.8455096931. The cubic root of 6686597 is about 188.3945708050.

The spelling of 6686597 in words is "six million, six hundred eighty-six thousand, five hundred ninety-seven".