2166169980971 has 2 divisors, whose sum is σ = 2166169980972. Its totient is φ = 2166169980970.

The previous prime is 2166169980889. The next prime is 2166169981057. The reversal of 2166169980971 is 1790899616612.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2166169980971 - 2¹⁸ = 2166169718827 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2166169980898 and 2166169980907.

It is not a weakly prime, because it can be changed into another prime (2166169940971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1083084990485 + 1083084990486.

It is an arithmetic number, because the mean of its divisors is an integer number (1083084990486).

Almost surely, 2^{2166169980971} is an apocalyptic number.

2166169980971 is a deficient number, since it is larger than the sum of its proper divisors (1).

2166169980971 is an equidigital number, since it uses as much as digits as its factorization.

2166169980971 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17635968, while the sum is 65.

The spelling of 2166169980971 in words is "two trillion, one hundred sixty-six billion, one hundred sixty-nine million, nine hundred eighty thousand, nine hundred seventy-one".