2166062521541 has 2 divisors, whose sum is σ = 2166062521542. Its totient is φ = 2166062521540.

The previous prime is 2166062521517. The next prime is 2166062521547. The reversal of 2166062521541 is 1451252606612.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2035318809316 + 130743712225 = 1426646^2 + 361585^2 .

It is a cyclic number.

It is not a de Polignac number, because 2166062521541 - 2²⁶ = 2165995412677 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2166062521547) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1083031260770 + 1083031260771.

It is an arithmetic number, because the mean of its divisors is an integer number (1083031260771).

Almost surely, 2^{2166062521541} is an apocalyptic number.

It is an amenable number.

2166062521541 is a deficient number, since it is larger than the sum of its proper divisors (1).

2166062521541 is an equidigital number, since it uses as much as digits as its factorization.

2166062521541 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 172800, while the sum is 41.

The spelling of 2166062521541 in words is "two trillion, one hundred sixty-six billion, sixty-two million, five hundred twenty-one thousand, five hundred forty-one".