6681977 has 16 divisors (see below), whose sum is σ = 7425600. Its totient is φ = 5987520.

The previous prime is 6681971. The next prime is 6681979. The reversal of 6681977 is 7791866.

It is a cyclic number.

It is not a de Polignac number, because 6681977 - 2⁸ = 6681721 is a prime.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6681971) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36827 + ... + 37007.

It is an arithmetic number, because the mean of its divisors is an integer number (464100).

Almost surely, 2^6681977 is an apocalyptic number.

6681977 is a gapful number since it is divisible by the number (67) formed by its first and last digit.

It is an amenable number.

6681977 is a deficient number, since it is larger than the sum of its proper divisors (743623).

6681977 is a wasteful number, since it uses less digits than its factorization.

6681977 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 296.

The product of its digits is 127008, while the sum is 44.

The square root of 6681977 is about 2584.9520305027. The cubic root of 6681977 is about 188.3511713771.

The spelling of 6681977 in words is "six million, six hundred eighty-one thousand, nine hundred seventy-seven".