166201343563 has 2 divisors, whose sum is σ = 166201343564. Its totient is φ = 166201343562.

The previous prime is 166201343549. The next prime is 166201343593. The reversal of 166201343563 is 365343102661.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-166201343563 is a prime.

It is not a weakly prime, because it can be changed into another prime (166201343513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83100671781 + 83100671782.

It is an arithmetic number, because the mean of its divisors is an integer number (83100671782).

Almost surely, 2^166201343563 is an apocalyptic number.

166201343563 is a deficient number, since it is larger than the sum of its proper divisors (1).

166201343563 is an equidigital number, since it uses as much as digits as its factorization.

166201343563 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 233280, while the sum is 40.

The spelling of 166201343563 in words is "one hundred sixty-six billion, two hundred one million, three hundred forty-three thousand, five hundred sixty-three".