6687740 has 12 divisors (see below), whose sum is σ = 14044296. Its totient is φ = 2675088.

The previous prime is 6687701. The next prime is 6687757. The reversal of 6687740 is 477866.

It is a junction number, because it is equal to n+sod(n) for n = 6687694 and 6687703.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 167174 + ... + 167213.

It is an arithmetic number, because the mean of its divisors is an integer number (1170358).

Almost surely, 2^6687740 is an apocalyptic number.

It is an amenable number.

6687740 is an abundant number, since it is smaller than the sum of its proper divisors (7356556).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6687740 is a wasteful number, since it uses less digits than its factorization.

6687740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 334396 (or 334394 counting only the distinct ones).

The product of its (nonzero) digits is 56448, while the sum is 38.

The square root of 6687740 is about 2586.0665111323. The cubic root of 6687740 is about 188.4053048514.

The spelling of 6687740 in words is "six million, six hundred eighty-seven thousand, seven hundred forty".