6645005465 has 32 divisors (see below), whose sum is σ = 9607348224. Its totient is φ = 4315734720.

The previous prime is 6645005461. The next prime is 6645005501. The reversal of 6645005465 is 5645005466.

It is not a de Polignac number, because 6645005465 - 2² = 6645005461 is a prime.

It is a Smith number, since the sum of its digits (41) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6645005461) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 14159 + ... + 116148.

It is an arithmetic number, because the mean of its divisors is an integer number (300229632).

Almost surely, 2^6645005465 is an apocalyptic number.

It is an amenable number.

6645005465 is a deficient number, since it is larger than the sum of its proper divisors (2962342759).

6645005465 is a wasteful number, since it uses less digits than its factorization.

6645005465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130397.

The product of its (nonzero) digits is 432000, while the sum is 41.

The square root of 6645005465 is about 81516.9029404332. The cubic root of 6645005465 is about 1880.0314489420.

Subtracting from 6645005465 its reverse (5645005466), we obtain a palindrome (999999999).

The spelling of 6645005465 in words is "six billion, six hundred forty-five million, five thousand, four hundred sixty-five".