6684805 has 4 divisors (see below), whose sum is σ = 8021772. Its totient is φ = 5347840.

The previous prime is 6684781. The next prime is 6684817. The reversal of 6684805 is 5084866.

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 5230369 + 1454436 = 2287^2 + 1206^2 .

It is not a de Polignac number, because 6684805 - 2⁵ = 6684773 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 668476 + ... + 668485.

It is an arithmetic number, because the mean of its divisors is an integer number (2005443).

Almost surely, 2^6684805 is an apocalyptic number.

It is an amenable number.

6684805 is a deficient number, since it is larger than the sum of its proper divisors (1336967).

6684805 is a wasteful number, since it uses less digits than its factorization.

6684805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1336966.

The product of its (nonzero) digits is 46080, while the sum is 37.

The square root of 6684805 is about 2585.4989847223. The cubic root of 6684805 is about 188.3777394615.

The spelling of 6684805 in words is "six million, six hundred eighty-four thousand, eight hundred five".