6681787 has 12 divisors (see below), whose sum is σ = 8182920. Its totient is φ = 5425056.

The previous prime is 6681781. The next prime is 6681791. The reversal of 6681787 is 7871866.

It is a de Polignac number, because none of the positive numbers 2^k-6681787 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6681781) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2658 + ... + 4519.

It is an arithmetic number, because the mean of its divisors is an integer number (681910).

Almost surely, 2^6681787 is an apocalyptic number.

6681787 is a deficient number, since it is larger than the sum of its proper divisors (1501133).

6681787 is a wasteful number, since it uses less digits than its factorization.

6681787 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7210 (or 7203 counting only the distinct ones).

The product of its digits is 112896, while the sum is 43.

The square root of 6681787 is about 2584.9152790759. The cubic root of 6681787 is about 188.3493861240.

The spelling of 6681787 in words is "six million, six hundred eighty-one thousand, seven hundred eighty-seven".