6647875 has 16 divisors (see below), whose sum is σ = 8936928. Its totient is φ = 4908000.

The previous prime is 6647869. The next prime is 6647887. The reversal of 6647875 is 5787466.

It is not a de Polignac number, because 6647875 - 2⁷ = 6647747 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 421 + ... + 3670.

It is an arithmetic number, because the mean of its divisors is an integer number (558558).

Almost surely, 2^6647875 is an apocalyptic number.

6647875 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

6647875 is a deficient number, since it is larger than the sum of its proper divisors (2289053).

6647875 is a wasteful number, since it uses less digits than its factorization.

6647875 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4119 (or 4109 counting only the distinct ones).

The product of its digits is 282240, while the sum is 43.

The square root of 6647875 is about 2578.3473388975. The cubic root of 6647875 is about 188.0302030093.

The spelling of 6647875 in words is "six million, six hundred forty-seven thousand, eight hundred seventy-five".