6668565 has 16 divisors (see below), whose sum is σ = 11014656. Its totient is φ = 3441600.

The previous prime is 6668549. The next prime is 6668567. The reversal of 6668565 is 5658666.

It is not a de Polignac number, because 6668565 - 2⁴ = 6668549 is a prime.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6668567) 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, 6706 + ... + 7635.

It is an arithmetic number, because the mean of its divisors is an integer number (688416).

Almost surely, 2^6668565 is an apocalyptic number.

It is an amenable number.

6668565 is a deficient number, since it is larger than the sum of its proper divisors (4346091).

6668565 is a wasteful number, since it uses less digits than its factorization.

6668565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14380.

The product of its digits is 259200, while the sum is 42.

The square root of 6668565 is about 2582.3564819753. The cubic root of 6668565 is about 188.2250680815.

The spelling of 6668565 in words is "six million, six hundred sixty-eight thousand, five hundred sixty-five".