6561050105665 has 16 divisors (see below), whose sum is σ = 8590414692096. Its totient is φ = 4770893001600.

The previous prime is 6561050105629. The next prime is 6561050105669. The reversal of 6561050105665 is 5665010501656.

It is not a de Polignac number, because 6561050105665 - 2¹³ = 6561050097473 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6561050105669) 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, 9407817 + ... + 10081126.

It is an arithmetic number, because the mean of its divisors is an integer number (536900918256).

Almost surely, 2^{6561050105665} is an apocalyptic number.

It is an amenable number.

6561050105665 is a deficient number, since it is larger than the sum of its proper divisors (2029364586431).

6561050105665 is a wasteful number, since it uses less digits than its factorization.

6561050105665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19495080.

The product of its (nonzero) digits is 810000, while the sum is 46.

The spelling of 6561050105665 in words is "six trillion, five hundred sixty-one billion, fifty million, one hundred five thousand, six hundred sixty-five".