6611845 has 4 divisors (see below), whose sum is σ = 7934220. Its totient is φ = 5289472.

The previous prime is 6611821. The next prime is 6611849. The reversal of 6611845 is 5481166.

6611845 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5481166 = 2 ⋅2740583.

It can be written as a sum of positive squares in 2 ways, for example, as 933156 + 5678689 = 966^2 + 2383^2 .

It is a cyclic number.

It is not a de Polignac number, because 6611845 - 2¹¹ = 6609797 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6611849) 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, 661180 + ... + 661189.

It is an arithmetic number, because the mean of its divisors is an integer number (1983555).

Almost surely, 2^6611845 is an apocalyptic number.

It is an amenable number.

6611845 is a deficient number, since it is larger than the sum of its proper divisors (1322375).

6611845 is a wasteful number, since it uses less digits than its factorization.

6611845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1322374.

The product of its digits is 5760, while the sum is 31.

The square root of 6611845 is about 2571.3508123164. The cubic root of 6611845 is about 187.6898935434.

It can be divided in two parts, 66 and 11845, that added together give a palindrome (11911).

The spelling of 6611845 in words is "six million, six hundred eleven thousand, eight hundred forty-five".