6684655 has 8 divisors (see below), whose sum is σ = 8493552. Its totient is φ = 5033088.

The previous prime is 6684647. The next prime is 6684659. The reversal of 6684655 is 5564866.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 6684655 - 2³ = 6684647 is a prime.

It is a super-2 number, since 2×6684655² = 89369224938050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6684659) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39237 + ... + 39406.

It is an arithmetic number, because the mean of its divisors is an integer number (1061694).

Almost surely, 2^6684655 is an apocalyptic number.

6684655 is a deficient number, since it is larger than the sum of its proper divisors (1808897).

6684655 is a wasteful number, since it uses less digits than its factorization.

6684655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78665.

The product of its digits is 172800, while the sum is 40.

The square root of 6684655 is about 2585.4699766193. The cubic root of 6684655 is about 188.3763304514.

The spelling of 6684655 in words is "six million, six hundred eighty-four thousand, six hundred fifty-five".