6619871 has 2 divisors, whose sum is σ = 6619872. Its totient is φ = 6619870.

The previous prime is 6619867. The next prime is 6619889. The reversal of 6619871 is 1789166.

6619871 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 6619871 - 2² = 6619867 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6619861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3309935 + 3309936.

It is an arithmetic number, because the mean of its divisors is an integer number (3309936).

Almost surely, 2^6619871 is an apocalyptic number.

6619871 is a deficient number, since it is larger than the sum of its proper divisors (1).

6619871 is an equidigital number, since it uses as much as digits as its factorization.

6619871 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18144, while the sum is 38.

The square root of 6619871 is about 2572.9109972947. The cubic root of 6619871 is about 187.7658072995.

The spelling of 6619871 in words is "six million, six hundred nineteen thousand, eight hundred seventy-one".