6639675 has 24 divisors (see below), whose sum is σ = 12546816. Its totient is φ = 3035040.

The previous prime is 6639653. The next prime is 6639679. The reversal of 6639675 is 5769366.

It is not a de Polignac number, because 6639675 - 2⁷ = 6639547 is a prime.

6639675 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (6639679) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5799 + ... + 6848.

It is an arithmetic number, because the mean of its divisors is an integer number (522784).

Almost surely, 2^6639675 is an apocalyptic number.

6639675 is a deficient number, since it is larger than the sum of its proper divisors (5907141).

6639675 is a wasteful number, since it uses less digits than its factorization.

6639675 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12667 (or 12662 counting only the distinct ones).

The product of its digits is 204120, while the sum is 42.

The square root of 6639675 is about 2576.7566823431. The cubic root of 6639675 is about 187.9528608990.

The spelling of 6639675 in words is "six million, six hundred thirty-nine thousand, six hundred seventy-five".