66105157 has 2 divisors, whose sum is σ = 66105158. Its totient is φ = 66105156.

The previous prime is 66105133. The next prime is 66105167. The reversal of 66105157 is 75150166.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 64545156 + 1560001 = 8034^2 + 1249^2 .

It is a cyclic number.

It is not a de Polignac number, because 66105157 - 2¹⁹ = 65580869 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66105107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33052578 + 33052579.

It is an arithmetic number, because the mean of its divisors is an integer number (33052579).

Almost surely, 2^66105157 is an apocalyptic number.

It is an amenable number.

66105157 is a deficient number, since it is larger than the sum of its proper divisors (1).

66105157 is an equidigital number, since it uses as much as digits as its factorization.

66105157 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6300, while the sum is 31.

The square root of 66105157 is about 8130.5077947198. The cubic root of 66105157 is about 404.3385167993.

The spelling of 66105157 in words is "sixty-six million, one hundred five thousand, one hundred fifty-seven".