17661661846063 has 2 divisors, whose sum is σ = 17661661846064. Its totient is φ = 17661661846062.

The previous prime is 17661661846061. The next prime is 17661661846097. The reversal of 17661661846063 is 36064816616671.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 17661661846063 - 2¹ = 17661661846061 is a prime.

Together with 17661661846061, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 17661661845992 and 17661661846010.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (17661661846061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8830830923031 + 8830830923032.

It is an arithmetic number, because the mean of its divisors is an integer number (8830830923032).

Almost surely, 2^{17661661846063} is an apocalyptic number.

17661661846063 is a deficient number, since it is larger than the sum of its proper divisors (1).

17661661846063 is an equidigital number, since it uses as much as digits as its factorization.

17661661846063 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 31352832, while the sum is 61.

The spelling of 17661661846063 in words is "seventeen trillion, six hundred sixty-one billion, six hundred sixty-one million, eight hundred forty-six thousand, sixty-three".