6681478 has 8 divisors (see below), whose sum is σ = 10033560. Its totient is φ = 3336960.

The previous prime is 6681443. The next prime is 6681481. The reversal of 6681478 is 8741866.

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

It is a self number, because there is not a number n which added to its sum of digits gives 6681478.

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, 1633 + ... + 4003.

It is an arithmetic number, because the mean of its divisors is an integer number (1254195).

Almost surely, 2^6681478 is an apocalyptic number.

6681478 is a deficient number, since it is larger than the sum of its proper divisors (3352082).

6681478 is a wasteful number, since it uses less digits than its factorization.

6681478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3782.

The product of its digits is 64512, while the sum is 40.

The square root of 6681478 is about 2584.8555085343. The cubic root of 6681478 is about 188.3464826663.

The spelling of 6681478 in words is "six million, six hundred eighty-one thousand, four hundred seventy-eight".