6639552 has 42 divisors (see below), whose sum is σ = 19032728. Its totient is φ = 2212992.

The previous prime is 6639547. The next prime is 6639593. The reversal of 6639552 is 2559366.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 5188 + ... + 6339.

Almost surely, 2^6639552 is an apocalyptic number.

It is an amenable number.

6639552 is an abundant number, since it is smaller than the sum of its proper divisors (12393176).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6639552 is a wasteful number, since it uses less digits than its factorization.

6639552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11545 (or 11532 counting only the distinct ones).

The product of its digits is 48600, while the sum is 36.

The square root of 6639552 is about 2576.7328150198. The cubic root of 6639552 is about 187.9517002827.

The spelling of 6639552 in words is "six million, six hundred thirty-nine thousand, five hundred fifty-two".