66000673 has 2 divisors, whose sum is σ = 66000674. Its totient is φ = 66000672.

The previous prime is 66000659. The next prime is 66000679. The reversal of 66000673 is 37600066.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 33373729 + 32626944 = 5777^2 + 5712^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66000673 is a prime.

It is not a weakly prime, because it can be changed into another prime (66000679) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33000336 + 33000337.

It is an arithmetic number, because the mean of its divisors is an integer number (33000337).

Almost surely, 2^66000673 is an apocalyptic number.

It is an amenable number.

66000673 is a deficient number, since it is larger than the sum of its proper divisors (1).

66000673 is an equidigital number, since it uses as much as digits as its factorization.

66000673 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4536, while the sum is 28.

The square root of 66000673 is about 8124.0798248171. The cubic root of 66000673 is about 404.1253756710.

The spelling of 66000673 in words is "sixty-six million, six hundred seventy-three", and thus it is an aban number.