66066137 has 2 divisors, whose sum is σ = 66066138. Its totient is φ = 66066136.

The previous prime is 66066109. The next prime is 66066149. The reversal of 66066137 is 73166066.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 59660176 + 6405961 = 7724^2 + 2531^2 .

It is a cyclic number.

It is not a de Polignac number, because 66066137 - 2⁶ = 66066073 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 66066097 and 66066106.

It is not a weakly prime, because it can be changed into another prime (66066107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33033068 + 33033069.

It is an arithmetic number, because the mean of its divisors is an integer number (33033069).

Almost surely, 2^66066137 is an apocalyptic number.

It is an amenable number.

66066137 is a deficient number, since it is larger than the sum of its proper divisors (1).

66066137 is an equidigital number, since it uses as much as digits as its factorization.

66066137 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27216, while the sum is 35.

The square root of 66066137 is about 8128.1078363910. The cubic root of 66066137 is about 404.2589446199.

The spelling of 66066137 in words is "sixty-six million, sixty-six thousand, one hundred thirty-seven".