6516661500103 has 2 divisors, whose sum is σ = 6516661500104. Its totient is φ = 6516661500102.

The previous prime is 6516661500101. The next prime is 6516661500113. The reversal of 6516661500103 is 3010051666156.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6516661500103 - 2¹ = 6516661500101 is a prime.

Together with 6516661500101, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6516661500101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3258330750051 + 3258330750052.

It is an arithmetic number, because the mean of its divisors is an integer number (3258330750052).

Almost surely, 2^{6516661500103} is an apocalyptic number.

6516661500103 is a deficient number, since it is larger than the sum of its proper divisors (1).

6516661500103 is an equidigital number, since it uses as much as digits as its factorization.

6516661500103 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 97200, while the sum is 40.

The spelling of 6516661500103 in words is "six trillion, five hundred sixteen billion, six hundred sixty-one million, five hundred thousand, one hundred three".