66307929169 has 2 divisors, whose sum is σ = 66307929170. Its totient is φ = 66307929168.

The previous prime is 66307929113. The next prime is 66307929187. The reversal of 66307929169 is 96192970366.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 63510048144 + 2797881025 = 252012^2 + 52895^2 .

It is a cyclic number.

It is not a de Polignac number, because 66307929169 - 2¹³ = 66307920977 is a prime.

It is a super-2 number, since 2×66307929169² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (66307929199) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33153964584 + 33153964585.

It is an arithmetic number, because the mean of its divisors is an integer number (33153964585).

Almost surely, 2^66307929169 is an apocalyptic number.

It is an amenable number.

66307929169 is a deficient number, since it is larger than the sum of its proper divisors (1).

66307929169 is an equidigital number, since it uses as much as digits as its factorization.

66307929169 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6613488, while the sum is 58.

The spelling of 66307929169 in words is "sixty-six billion, three hundred seven million, nine hundred twenty-nine thousand, one hundred sixty-nine".