16616566627 has 2 divisors, whose sum is σ = 16616566628. Its totient is φ = 16616566626.

The previous prime is 16616566597. The next prime is 16616566639. The reversal of 16616566627 is 72666561661.

It is a strong prime.

It is an emirp because it is prime and its reverse (72666561661) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16616566627 is a prime.

It is a super-2 number, since 2×16616566627² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (16616566327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8308283313 + 8308283314.

It is an arithmetic number, because the mean of its divisors is an integer number (8308283314).

Almost surely, 2^16616566627 is an apocalyptic number.

16616566627 is a deficient number, since it is larger than the sum of its proper divisors (1).

16616566627 is an equidigital number, since it uses as much as digits as its factorization.

16616566627 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3265920, while the sum is 52.

The spelling of 16616566627 in words is "sixteen billion, six hundred sixteen million, five hundred sixty-six thousand, six hundred twenty-seven".