6681565 has 16 divisors (see below), whose sum is σ = 8963136. Its totient is φ = 4739200.

The previous prime is 6681557. The next prime is 6681581. The reversal of 6681565 is 5651866.

It is not a de Polignac number, because 6681565 - 2³ = 6681557 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 15 ways as a sum of consecutive naturals, for example, 774 + ... + 3736.

It is an arithmetic number, because the mean of its divisors is an integer number (560196).

Almost surely, 2^6681565 is an apocalyptic number.

It is an amenable number.

6681565 is a deficient number, since it is larger than the sum of its proper divisors (2281571).

6681565 is a wasteful number, since it uses less digits than its factorization.

6681565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3020.

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

The square root of 6681565 is about 2584.8723372732. The cubic root of 6681565 is about 188.3473001537.

The spelling of 6681565 in words is "six million, six hundred eighty-one thousand, five hundred sixty-five".