66366149 has 2 divisors, whose sum is σ = 66366150. Its totient is φ = 66366148.

The previous prime is 66366137. The next prime is 66366151. The reversal of 66366149 is 94166366.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 49801249 + 16564900 = 7057^2 + 4070^2 .

It is a cyclic number.

It is not a de Polignac number, because 66366149 - 2¹⁶ = 66300613 is a prime.

Together with 66366151, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66366749) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33183074 + 33183075.

It is an arithmetic number, because the mean of its divisors is an integer number (33183075).

Almost surely, 2^66366149 is an apocalyptic number.

It is an amenable number.

66366149 is a deficient number, since it is larger than the sum of its proper divisors (1).

66366149 is an equidigital number, since it uses as much as digits as its factorization.

66366149 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 139968, while the sum is 41.

The square root of 66366149 is about 8146.5421498940. The cubic root of 66366149 is about 404.8699455398.

The spelling of 66366149 in words is "sixty-six million, three hundred sixty-six thousand, one hundred forty-nine".