2166571611047 has 2 divisors, whose sum is σ = 2166571611048. Its totient is φ = 2166571611046.

The previous prime is 2166571611037. The next prime is 2166571611199. The reversal of 2166571611047 is 7401161756612.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2166571611047 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2166571610992 and 2166571611010.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2166571611037) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1083285805523 + 1083285805524.

It is an arithmetic number, because the mean of its divisors is an integer number (1083285805524).

Almost surely, 2^{2166571611047} is an apocalyptic number.

2166571611047 is a deficient number, since it is larger than the sum of its proper divisors (1).

2166571611047 is an equidigital number, since it uses as much as digits as its factorization.

2166571611047 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 423360, while the sum is 47.

The spelling of 2166571611047 in words is "two trillion, one hundred sixty-six billion, five hundred seventy-one million, six hundred eleven thousand, forty-seven".