6628657 has 16 divisors (see below), whose sum is σ = 8180352. Its totient is φ = 5241600.

The previous prime is 6628651. The next prime is 6628667. The reversal of 6628657 is 7568266.

It is not a de Polignac number, because 6628657 - 2¹⁹ = 6104369 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6628651) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5782 + ... + 6832.

It is an arithmetic number, because the mean of its divisors is an integer number (511272).

Almost surely, 2^6628657 is an apocalyptic number.

It is an amenable number.

6628657 is a deficient number, since it is larger than the sum of its proper divisors (1551695).

6628657 is a wasteful number, since it uses less digits than its factorization.

6628657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1128.

The product of its digits is 120960, while the sum is 40.

The square root of 6628657 is about 2574.6178357185. The cubic root of 6628657 is about 187.8488391833.

The spelling of 6628657 in words is "six million, six hundred twenty-eight thousand, six hundred fifty-seven".