6605878 has 4 divisors (see below), whose sum is σ = 9908820. Its totient is φ = 3302938.

The previous prime is 6605857. The next prime is 6605891. The reversal of 6605878 is 8785066.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8785066 = 2 ⋅4392533.

It is a self number, because there is not a number n which added to its sum of digits gives 6605878.

It is a congruent 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 as a sum of consecutive naturals, namely, 1651468 + ... + 1651471.

It is an arithmetic number, because the mean of its divisors is an integer number (2477205).

Almost surely, 2^6605878 is an apocalyptic number.

6605878 is a deficient number, since it is larger than the sum of its proper divisors (3302942).

6605878 is a wasteful number, since it uses less digits than its factorization.

6605878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3302941.

The product of its (nonzero) digits is 80640, while the sum is 40.

The square root of 6605878 is about 2570.1902653306. The cubic root of 6605878 is about 187.6334149725.

The spelling of 6605878 in words is "six million, six hundred five thousand, eight hundred seventy-eight".