6628111 has 4 divisors (see below), whose sum is σ = 7574992. Its totient is φ = 5681232.

The previous prime is 6628103. The next prime is 6628123. The reversal of 6628111 is 1118266.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1118266 = 2 ⋅559133.

It is a cyclic number.

It is not a de Polignac number, because 6628111 - 2³ = 6628103 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6628411) 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, 473430 + ... + 473443.

It is an arithmetic number, because the mean of its divisors is an integer number (1893748).

Almost surely, 2^6628111 is an apocalyptic number.

6628111 is a deficient number, since it is larger than the sum of its proper divisors (946881).

6628111 is an equidigital number, since it uses as much as digits as its factorization.

6628111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 946880.

The product of its digits is 576, while the sum is 25.

The square root of 6628111 is about 2574.5117983804. The cubic root of 6628111 is about 187.8436813621.

The spelling of 6628111 in words is "six million, six hundred twenty-eight thousand, one hundred eleven".