6888865 has 4 divisors (see below), whose sum is σ = 8266644. Its totient is φ = 5511088.

The previous prime is 6888857. The next prime is 6888877. The reversal of 6888865 is 5688886.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1745041 + 5143824 = 1321^2 + 2268^2 .

It is a cyclic number.

It is not a de Polignac number, because 6888865 - 2³ = 6888857 is a prime.

It is a Duffinian number.

6888865 is a lucky number.

It is an unprimeable number.

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, 688882 + ... + 688891.

It is an arithmetic number, because the mean of its divisors is an integer number (2066661).

Almost surely, 2^6888865 is an apocalyptic number.

It is an amenable number.

6888865 is a deficient number, since it is larger than the sum of its proper divisors (1377779).

6888865 is a wasteful number, since it uses less digits than its factorization.

6888865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1377778.

The product of its digits is 737280, while the sum is 49.

The square root of 6888865 is about 2624.6647404954. The cubic root of 6888865 is about 190.2753625037.

The spelling of 6888865 in words is "six million, eight hundred eighty-eight thousand, eight hundred sixty-five".