6628857 has 8 divisors (see below), whose sum is σ = 8856576. Its totient is φ = 4410192.

The previous prime is 6628847. The next prime is 6628859. The reversal of 6628857 is 7588266.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 6628857 - 2⁷ = 6628729 is a prime.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (6628859) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 313 + ... + 3654.

It is an arithmetic number, because the mean of its divisors is an integer number (1107072).

Almost surely, 2^6628857 is an apocalyptic number.

It is an amenable number.

6628857 is a deficient number, since it is larger than the sum of its proper divisors (2227719).

6628857 is a wasteful number, since it uses less digits than its factorization.

6628857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4527.

The product of its digits is 161280, while the sum is 42.

The square root of 6628857 is about 2574.6566761415. The cubic root of 6628857 is about 187.8507284242.

The spelling of 6628857 in words is "six million, six hundred twenty-eight thousand, eight hundred fifty-seven".