6681655 has 12 divisors (see below), whose sum is σ = 8159976. Its totient is φ = 5252000.

The previous prime is 6681637. The next prime is 6681671. The reversal of 6681655 is 5561866.

It is a de Polignac number, because none of the positive numbers 2^k-6681655 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 50940 + ... + 51070.

It is an arithmetic number, because the mean of its divisors is an integer number (679998).

Almost surely, 2^6681655 is an apocalyptic number.

6681655 is a deficient number, since it is larger than the sum of its proper divisors (1478321).

6681655 is a wasteful number, since it uses less digits than its factorization.

6681655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 338 (or 237 counting only the distinct ones).

The product of its digits is 43200, while the sum is 37.

The square root of 6681655 is about 2584.8897461981. The cubic root of 6681655 is about 188.3481458229.

The spelling of 6681655 in words is "six million, six hundred eighty-one thousand, six hundred fifty-five".