6643275 has 24 divisors (see below), whose sum is σ = 11104944. Its totient is φ = 3504000.

The previous prime is 6643261. The next prime is 6643283. The reversal of 6643275 is 5723466.

It is not a de Polignac number, because 6643275 - 2⁶ = 6643211 is a prime.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 7137 + ... + 8013.

It is an arithmetic number, because the mean of its divisors is an integer number (462706).

Almost surely, 2^6643275 is an apocalyptic number.

6643275 is a deficient number, since it is larger than the sum of its proper divisors (4461669).

6643275 is a wasteful number, since it uses less digits than its factorization.

6643275 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 991 (or 986 counting only the distinct ones).

The product of its digits is 30240, while the sum is 33.

The square root of 6643275 is about 2577.4551402498. The cubic root of 6643275 is about 187.9868238087.

The spelling of 6643275 in words is "six million, six hundred forty-three thousand, two hundred seventy-five".