6681963 has 4 divisors (see below), whose sum is σ = 8909288. Its totient is φ = 4454640.

The previous prime is 6681959. The next prime is 6681967. The reversal of 6681963 is 3691866.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (6681959) and next prime (6681967).

It is not a de Polignac number, because 6681963 - 2² = 6681959 is a prime.

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6681967) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1113658 + ... + 1113663.

It is an arithmetic number, because the mean of its divisors is an integer number (2227322).

Almost surely, 2^6681963 is an apocalyptic number.

6681963 is a deficient number, since it is larger than the sum of its proper divisors (2227325).

6681963 is a wasteful number, since it uses less digits than its factorization.

6681963 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2227324.

The product of its digits is 46656, while the sum is 39.

The square root of 6681963 is about 2584.9493225207. The cubic root of 6681963 is about 188.3510398333.

The spelling of 6681963 in words is "six million, six hundred eighty-one thousand, nine hundred sixty-three".