6565551316 has 6 divisors (see below), whose sum is σ = 11489714810. Its totient is φ = 3282775656.

The previous prime is 6565551313. The next prime is 6565551353. The reversal of 6565551316 is 6131555656.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 4394364100 + 2171187216 = 66290^2 + 46596^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6565551313) 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 as a sum of consecutive naturals, namely, 820693911 + ... + 820693918.

Almost surely, 2^6565551316 is an apocalyptic number.

It is an amenable number.

6565551316 is a deficient number, since it is larger than the sum of its proper divisors (4924163494).

6565551316 is a wasteful number, since it uses less digits than its factorization.

6565551316 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1641387833 (or 1641387831 counting only the distinct ones).

The product of its digits is 405000, while the sum is 43.

The square root of 6565551316 is about 81028.0896726561. The cubic root of 6565551316 is about 1872.5082222071.

The spelling of 6565551316 in words is "six billion, five hundred sixty-five million, five hundred fifty-one thousand, three hundred sixteen".