6687251 has 2 divisors, whose sum is σ = 6687252. Its totient is φ = 6687250.

The previous prime is 6687229. The next prime is 6687283. The reversal of 6687251 is 1527866.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6687251 - 2¹⁰ = 6686227 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (6687451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3343625 + 3343626.

It is an arithmetic number, because the mean of its divisors is an integer number (3343626).

Almost surely, 2^6687251 is an apocalyptic number.

6687251 is a deficient number, since it is larger than the sum of its proper divisors (1).

6687251 is an equidigital number, since it uses as much as digits as its factorization.

6687251 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20160, while the sum is 35.

The square root of 6687251 is about 2585.9719642718. The cubic root of 6687251 is about 188.4007127450.

The spelling of 6687251 in words is "six million, six hundred eighty-seven thousand, two hundred fifty-one".