6505622065 has 4 divisors (see below), whose sum is σ = 7806746484. Its totient is φ = 5204497648.

The previous prime is 6505622029. The next prime is 6505622083. The reversal of 6505622065 is 5602265056.

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 4389990049 + 2115632016 = 66257^2 + 45996^2 .

It is a cyclic number.

It is not a de Polignac number, because 6505622065 - 2⁷ = 6505621937 is a prime.

It is a super-2 number, since 2×6505622065² = 84646236905229728450, which contains 22 as substring.

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, 650562202 + ... + 650562211.

It is an arithmetic number, because the mean of its divisors is an integer number (1951686621).

Almost surely, 2^6505622065 is an apocalyptic number.

It is an amenable number.

6505622065 is a deficient number, since it is larger than the sum of its proper divisors (1301124419).

6505622065 is a wasteful number, since it uses less digits than its factorization.

6505622065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1301124418.

The product of its (nonzero) digits is 108000, while the sum is 37.

The square root of 6505622065 is about 80657.4365139384. The cubic root of 6505622065 is about 1866.7934854138.

The spelling of 6505622065 in words is "six billion, five hundred five million, six hundred twenty-two thousand, sixty-five".