6665545065 has 16 divisors (see below), whose sum is σ = 10675424448. Its totient is φ = 3551439936.

The previous prime is 6665545039. The next prime is 6665545087. The reversal of 6665545065 is 5605455666.

It is not a de Polignac number, because 6665545065 - 2²⁷ = 6531327337 is a prime.

It is a Curzon 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, 204139 + ... + 234528.

It is an arithmetic number, because the mean of its divisors is an integer number (667214028).

Almost surely, 2^6665545065 is an apocalyptic number.

It is an amenable number.

6665545065 is a deficient number, since it is larger than the sum of its proper divisors (4009879383).

6665545065 is a wasteful number, since it uses less digits than its factorization.

6665545065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 439688.

The product of its (nonzero) digits is 3240000, while the sum is 48.

The square root of 6665545065 is about 81642.7894244189. The cubic root of 6665545065 is about 1881.9665050846.

The spelling of 6665545065 in words is "six billion, six hundred sixty-five million, five hundred forty-five thousand, sixty-five".