6668505065 has 16 divisors (see below), whose sum is σ = 8202917520. Its totient is φ = 5201172480.

The previous prime is 6668505061. The next prime is 6668505073. The reversal of 6668505065 is 5605058666.

It can be written as a sum of positive squares in 8 ways, for example, as 1035101929 + 5633403136 = 32173^2 + 75056^2 .

It is not a de Polignac number, because 6668505065 - 2² = 6668505061 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6668505061) 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, 317201 + ... + 337569.

It is an arithmetic number, because the mean of its divisors is an integer number (512682345).

Almost surely, 2^6668505065 is an apocalyptic number.

It is an amenable number.

6668505065 is a deficient number, since it is larger than the sum of its proper divisors (1534412455).

6668505065 is a wasteful number, since it uses less digits than its factorization.

6668505065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22012.

The product of its (nonzero) digits is 1296000, while the sum is 47.

The square root of 6668505065 is about 81660.9151614161. The cubic root of 6668505065 is about 1882.2450417691.

The spelling of 6668505065 in words is "six billion, six hundred sixty-eight million, five hundred five thousand, sixty-five".