6616690966187 has 2 divisors, whose sum is σ = 6616690966188. Its totient is φ = 6616690966186.

The previous prime is 6616690966159. The next prime is 6616690966199. The reversal of 6616690966187 is 7816690966166.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6616690966187 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6616690966187.

It is not a weakly prime, because it can be changed into another prime (6616690966157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3308345483093 + 3308345483094.

It is an arithmetic number, because the mean of its divisors is an integer number (3308345483094).

Almost surely, 2^{6616690966187} is an apocalyptic number.

6616690966187 is a deficient number, since it is larger than the sum of its proper divisors (1).

6616690966187 is an equidigital number, since it uses as much as digits as its factorization.

6616690966187 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 211631616, while the sum is 71.

The spelling of 6616690966187 in words is "six trillion, six hundred sixteen billion, six hundred ninety million, nine hundred sixty-six thousand, one hundred eighty-seven".