6681505 has 8 divisors (see below), whose sum is σ = 8049024. Its totient is φ = 5324400.

The previous prime is 6681491. The next prime is 6681511. The reversal of 6681505 is 5051866.

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

It is not a de Polignac number, because 6681505 - 2⁷ = 6681377 is a prime.

It is a Duffinian 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 7 ways as a sum of consecutive naturals, for example, 1111 + ... + 3820.

It is an arithmetic number, because the mean of its divisors is an integer number (1006128).

Almost surely, 2^6681505 is an apocalyptic number.

It is an amenable number.

6681505 is a deficient number, since it is larger than the sum of its proper divisors (1367519).

6681505 is a wasteful number, since it uses less digits than its factorization.

6681505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5207.

The product of its (nonzero) digits is 7200, while the sum is 31.

The square root of 6681505 is about 2584.8607312581. The cubic root of 6681505 is about 188.3467363700.

The spelling of 6681505 in words is "six million, six hundred eighty-one thousand, five hundred five".