6628855 has 4 divisors (see below), whose sum is σ = 7954632. Its totient is φ = 5303080.

The previous prime is 6628847. The next prime is 6628859. The reversal of 6628855 is 5588266.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 6628855 - 2³ = 6628847 is a prime.

It is a super-2 number, since 2×6628855² = 87883437222050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

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

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 662881 + ... + 662890.

It is an arithmetic number, because the mean of its divisors is an integer number (1988658).

Almost surely, 2^6628855 is an apocalyptic number.

6628855 is a deficient number, since it is larger than the sum of its proper divisors (1325777).

6628855 is a wasteful number, since it uses less digits than its factorization.

6628855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1325776.

The product of its digits is 115200, while the sum is 40.

The square root of 6628855 is about 2574.6562877402. The cubic root of 6628855 is about 187.8507095320.

The spelling of 6628855 in words is "six million, six hundred twenty-eight thousand, eight hundred fifty-five".