42166564229 has 2 divisors, whose sum is σ = 42166564230. Its totient is φ = 42166564228.

The previous prime is 42166564199. The next prime is 42166564243. The reversal of 42166564229 is 92246566124.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 41620080100 + 546484129 = 204010^2 + 23377^2 .

It is a cyclic number.

It is not a de Polignac number, because 42166564229 - 2⁸ = 42166563973 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42166564129) 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, 21083282114 + 21083282115.

It is an arithmetic number, because the mean of its divisors is an integer number (21083282115).

Almost surely, 2^42166564229 is an apocalyptic number.

It is an amenable number.

42166564229 is a deficient number, since it is larger than the sum of its proper divisors (1).

42166564229 is an equidigital number, since it uses as much as digits as its factorization.

42166564229 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1244160, while the sum is 47.

The spelling of 42166564229 in words is "forty-two billion, one hundred sixty-six million, five hundred sixty-four thousand, two hundred twenty-nine".