42166005263 has 2 divisors, whose sum is σ = 42166005264. Its totient is φ = 42166005262.

The previous prime is 42166005139. The next prime is 42166005283. The reversal of 42166005263 is 36250066124.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 42166005263 - 2¹⁶ = 42165939727 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42166005283) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21083002631 + 21083002632.

It is an arithmetic number, because the mean of its divisors is an integer number (21083002632).

Almost surely, 2^42166005263 is an apocalyptic number.

42166005263 is a deficient number, since it is larger than the sum of its proper divisors (1).

42166005263 is an equidigital number, since it uses as much as digits as its factorization.

42166005263 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 51840, while the sum is 35.

The spelling of 42166005263 in words is "forty-two billion, one hundred sixty-six million, five thousand, two hundred sixty-three".