6628645 has 16 divisors (see below), whose sum is σ = 8264448. Its totient is φ = 5100480.

The previous prime is 6628639. The next prime is 6628651. The reversal of 6628645 is 5468266.

It is an interprime number because it is at equal distance from previous prime (6628639) and next prime (6628651).

It is not a de Polignac number, because 6628645 - 2⁵ = 6628613 is a prime.

It is a Duffinian number.

Its product of digits (69120) is a multiple of the sum of its prime divisors (540).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15535 + ... + 15955.

It is an arithmetic number, because the mean of its divisors is an integer number (516528).

Almost surely, 2^6628645 is an apocalyptic number.

It is an amenable number.

6628645 is a deficient number, since it is larger than the sum of its proper divisors (1635803).

6628645 is a wasteful number, since it uses less digits than its factorization.

6628645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 540.

The product of its digits is 69120, while the sum is 37.

The square root of 6628645 is about 2574.6155052745. The cubic root of 6628645 is about 187.8487258276.

The spelling of 6628645 in words is "six million, six hundred twenty-eight thousand, six hundred forty-five".