6506165559 has 4 divisors (see below), whose sum is σ = 8674887416. Its totient is φ = 4337443704.

The previous prime is 6506165531. The next prime is 6506165639. The reversal of 6506165559 is 9555616056.

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

It is not a de Polignac number, because 6506165559 - 2⁷ = 6506165431 is a prime.

It is a super-2 number, since 2×6506165559² = 84660380562235564962, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6506165059) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1084360924 + ... + 1084360929.

It is an arithmetic number, because the mean of its divisors is an integer number (2168721854).

Almost surely, 2^6506165559 is an apocalyptic number.

6506165559 is a deficient number, since it is larger than the sum of its proper divisors (2168721857).

6506165559 is a wasteful number, since it uses less digits than its factorization.

6506165559 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2168721856.

The product of its (nonzero) digits is 1215000, while the sum is 48.

The square root of 6506165559 is about 80660.8055935471. The cubic root of 6506165559 is about 1866.8454693131.

The spelling of 6506165559 in words is "six billion, five hundred six million, one hundred sixty-five thousand, five hundred fifty-nine".