6516661500101 has 2 divisors, whose sum is σ = 6516661500102. Its totient is φ = 6516661500100.

The previous prime is 6516661500043. The next prime is 6516661500103. The reversal of 6516661500101 is 1010051666156.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5802004300225 + 714657199876 = 2408735^2 + 845374^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6516661500101 is a prime.

Together with 6516661500103, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6516661500103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3258330750050 + 3258330750051.

It is an arithmetic number, because the mean of its divisors is an integer number (3258330750051).

Almost surely, 2^{6516661500101} is an apocalyptic number.

It is an amenable number.

6516661500101 is a deficient number, since it is larger than the sum of its proper divisors (1).

6516661500101 is an equidigital number, since it uses as much as digits as its factorization.

6516661500101 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32400, while the sum is 38.

The spelling of 6516661500101 in words is "six trillion, five hundred sixteen billion, six hundred sixty-one million, five hundred thousand, one hundred one".