16555580663 has 2 divisors, whose sum is σ = 16555580664. Its totient is φ = 16555580662.

The previous prime is 16555580653. The next prime is 16555580689. The reversal of 16555580663 is 36608555561.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 16555580663 - 2⁴ = 16555580647 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16555580653) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8277790331 + 8277790332.

It is an arithmetic number, because the mean of its divisors is an integer number (8277790332).

Almost surely, 2^16555580663 is an apocalyptic number.

16555580663 is a deficient number, since it is larger than the sum of its proper divisors (1).

16555580663 is an equidigital number, since it uses as much as digits as its factorization.

16555580663 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3240000, while the sum is 50.

The spelling of 16555580663 in words is "sixteen billion, five hundred fifty-five million, five hundred eighty thousand, six hundred sixty-three".