6687427 has 2 divisors, whose sum is σ = 6687428. Its totient is φ = 6687426.

The previous prime is 6687391. The next prime is 6687437. The reversal of 6687427 is 7247866.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6687427 - 2¹¹ = 6685379 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6687427.

It is not a weakly prime, because it can be changed into another prime (6687437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3343713 + 3343714.

It is an arithmetic number, because the mean of its divisors is an integer number (3343714).

Almost surely, 2^6687427 is an apocalyptic number.

6687427 is a deficient number, since it is larger than the sum of its proper divisors (1).

6687427 is an equidigital number, since it uses as much as digits as its factorization.

6687427 is an evil number, because the sum of its binary digits is even.

The product of its digits is 112896, while the sum is 40.

The square root of 6687427 is about 2586.0059938059. The cubic root of 6687427 is about 188.4023655535.

The spelling of 6687427 in words is "six million, six hundred eighty-seven thousand, four hundred twenty-seven".