6501605606065 has 4 divisors (see below), whose sum is σ = 7801926727284. Its totient is φ = 5201284484848.

The previous prime is 6501605606059. The next prime is 6501605606077. The reversal of 6501605606065 is 5606065061056.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2687619244816 + 3813986361249 = 1639396^2 + 1952943^2 .

It is a cyclic number.

It is not a de Polignac number, because 6501605606065 - 2¹¹ = 6501605604017 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 650160560602 + ... + 650160560611.

It is an arithmetic number, because the mean of its divisors is an integer number (1950481681821).

Almost surely, 2^{6501605606065} is an apocalyptic number.

It is an amenable number.

6501605606065 is a deficient number, since it is larger than the sum of its proper divisors (1300321121219).

6501605606065 is a wasteful number, since it uses less digits than its factorization.

6501605606065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1300321121218.

The product of its (nonzero) digits is 972000, while the sum is 46.

The spelling of 6501605606065 in words is "six trillion, five hundred one billion, six hundred five million, six hundred six thousand, sixty-five".