6628637 has 4 divisors (see below), whose sum is σ = 6842496. Its totient is φ = 6414780.

The previous prime is 6628621. The next prime is 6628639. The reversal of 6628637 is 7368266.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 6628637 - 2⁴ = 6628621 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 6628637.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6628639) 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 3 ways as a sum of consecutive naturals, for example, 106883 + ... + 106944.

It is an arithmetic number, because the mean of its divisors is an integer number (1710624).

Almost surely, 2^6628637 is an apocalyptic number.

It is an amenable number.

6628637 is a deficient number, since it is larger than the sum of its proper divisors (213859).

6628637 is a wasteful number, since it uses less digits than its factorization.

6628637 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 213858.

The product of its digits is 72576, while the sum is 38.

The square root of 6628637 is about 2574.6139516440. The cubic root of 6628637 is about 187.8486502571.

The spelling of 6628637 in words is "six million, six hundred twenty-eight thousand, six hundred thirty-seven".