6657887 has 2 divisors, whose sum is σ = 6657888. Its totient is φ = 6657886.

The previous prime is 6657881. The next prime is 6657919. The reversal of 6657887 is 7887566.

6657887 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6657887 - 2⁸ = 6657631 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6657881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3328943 + 3328944.

It is an arithmetic number, because the mean of its divisors is an integer number (3328944).

Almost surely, 2^6657887 is an apocalyptic number.

6657887 is a deficient number, since it is larger than the sum of its proper divisors (1).

6657887 is an equidigital number, since it uses as much as digits as its factorization.

6657887 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 564480, while the sum is 47.

The square root of 6657887 is about 2580.2881622020. The cubic root of 6657887 is about 188.1245496544.

The spelling of 6657887 in words is "six million, six hundred fifty-seven thousand, eight hundred eighty-seven".