16845668663 has 2 divisors, whose sum is σ = 16845668664. Its totient is φ = 16845668662.

The previous prime is 16845668633. The next prime is 16845668681. The reversal of 16845668663 is 36686654861.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 16845668663 - 2¹² = 16845664567 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16845668633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8422834331 + 8422834332.

It is an arithmetic number, because the mean of its divisors is an integer number (8422834332).

Almost surely, 2^16845668663 is an apocalyptic number.

16845668663 is a deficient number, since it is larger than the sum of its proper divisors (1).

16845668663 is an equidigital number, since it uses as much as digits as its factorization.

16845668663 is an evil number, because the sum of its binary digits is even.

The product of its digits is 29859840, while the sum is 59.

The spelling of 16845668663 in words is "sixteen billion, eight hundred forty-five million, six hundred sixty-eight thousand, six hundred sixty-three".