66000149 has 2 divisors, whose sum is σ = 66000150. Its totient is φ = 66000148.

The previous prime is 66000083. The next prime is 66000157. The reversal of 66000149 is 94100066.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 65448100 + 552049 = 8090^2 + 743^2 .

It is a cyclic number.

It is not a de Polignac number, because 66000149 - 2¹² = 65996053 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66000169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33000074 + 33000075.

It is an arithmetic number, because the mean of its divisors is an integer number (33000075).

Almost surely, 2^66000149 is an apocalyptic number.

It is an amenable number.

66000149 is a deficient number, since it is larger than the sum of its proper divisors (1).

66000149 is an equidigital number, since it uses as much as digits as its factorization.

66000149 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 66000149 is about 8124.0475749469. The cubic root of 66000149 is about 404.1243061755.

The spelling of 66000149 in words is "sixty-six million, one hundred forty-nine", and thus it is an aban number.