6681427 has 2 divisors, whose sum is σ = 6681428. Its totient is φ = 6681426.

The previous prime is 6681421. The next prime is 6681439. The reversal of 6681427 is 7241866.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6681427 - 2³ = 6681419 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 6681392 and 6681401.

It is not a weakly prime, because it can be changed into another prime (6681421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3340713 + 3340714.

It is an arithmetic number, because the mean of its divisors is an integer number (3340714).

Almost surely, 2^6681427 is an apocalyptic number.

6681427 is a deficient number, since it is larger than the sum of its proper divisors (1).

6681427 is an equidigital number, since it uses as much as digits as its factorization.

6681427 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16128, while the sum is 34.

The square root of 6681427 is about 2584.8456433605. The cubic root of 6681427 is about 188.3460034462.

The spelling of 6681427 in words is "six million, six hundred eighty-one thousand, four hundred twenty-seven".