6551116505 has 4 divisors (see below), whose sum is σ = 7861339812. Its totient is φ = 5240893200.

The previous prime is 6551116499. The next prime is 6551116529. The reversal of 6551116505 is 5056111556.

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 4737293584 + 1813822921 = 68828^2 + 42589^2 .

It is not a de Polignac number, because 6551116505 - 2⁸ = 6551116249 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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, 655111646 + ... + 655111655.

It is an arithmetic number, because the mean of its divisors is an integer number (1965334953).

Almost surely, 2^6551116505 is an apocalyptic number.

It is an amenable number.

6551116505 is a deficient number, since it is larger than the sum of its proper divisors (1310223307).

6551116505 is a wasteful number, since it uses less digits than its factorization.

6551116505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1310223306.

The product of its (nonzero) digits is 22500, while the sum is 35.

The square root of 6551116505 is about 80938.9677781969. The cubic root of 6551116505 is about 1871.1349364109.

The spelling of 6551116505 in words is "six billion, five hundred fifty-one million, one hundred sixteen thousand, five hundred five".