2166062521243 has 2 divisors, whose sum is σ = 2166062521244. Its totient is φ = 2166062521242.

The previous prime is 2166062521237. The next prime is 2166062521261. The reversal of 2166062521243 is 3421252606612.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2166062521243 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2166062521196 and 2166062521205.

It is not a weakly prime, because it can be changed into another prime (2166062521223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1083031260621 + 1083031260622.

It is an arithmetic number, because the mean of its divisors is an integer number (1083031260622).

Almost surely, 2^{2166062521243} is an apocalyptic number.

2166062521243 is a deficient number, since it is larger than the sum of its proper divisors (1).

2166062521243 is an equidigital number, since it uses as much as digits as its factorization.

2166062521243 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 207360, while the sum is 40.

The spelling of 2166062521243 in words is "two trillion, one hundred sixty-six billion, sixty-two million, five hundred twenty-one thousand, two hundred forty-three".