6631871 has 2 divisors, whose sum is σ = 6631872. Its totient is φ = 6631870.

The previous prime is 6631789. The next prime is 6631883. The reversal of 6631871 is 1781366.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6631871 - 2¹⁰ = 6630847 is a prime.

It is a Sophie Germain 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 (6631271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3315935 + 3315936.

It is an arithmetic number, because the mean of its divisors is an integer number (3315936).

Almost surely, 2^6631871 is an apocalyptic number.

6631871 is a deficient number, since it is larger than the sum of its proper divisors (1).

6631871 is an equidigital number, since it uses as much as digits as its factorization.

6631871 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6048, while the sum is 32.

The square root of 6631871 is about 2575.2419303825. The cubic root of 6631871 is about 187.8791946845.

The spelling of 6631871 in words is "six million, six hundred thirty-one thousand, eight hundred seventy-one".