6664871 has 12 divisors (see below), whose sum is σ = 7153608. Its totient is φ = 6205584.

The previous prime is 6664859. The next prime is 6664873. The reversal of 6664871 is 1784666.

It is not a de Polignac number, because 6664871 - 2¹⁴ = 6648487 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6664873) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 22601 + ... + 22893.

It is an arithmetic number, because the mean of its divisors is an integer number (596134).

Almost surely, 2^6664871 is an apocalyptic number.

6664871 is a deficient number, since it is larger than the sum of its proper divisors (488737).

6664871 is a wasteful number, since it uses less digits than its factorization.

6664871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 382 (or 359 counting only the distinct ones).

The product of its digits is 48384, while the sum is 38.

The square root of 6664871 is about 2581.6411446985. The cubic root of 6664871 is about 188.1903063885.

The spelling of 6664871 in words is "six million, six hundred sixty-four thousand, eight hundred seventy-one".