66000007 has 2 divisors, whose sum is σ = 66000008. Its totient is φ = 66000006.

The previous prime is 65999993. The next prime is 66000013. The reversal of 66000007 is 70000066.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66000007 - 2¹¹ = 65997959 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 (66000047) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33000003 + 33000004.

It is an arithmetic number, because the mean of its divisors is an integer number (33000004).

Almost surely, 2^66000007 is an apocalyptic number.

66000007 is a deficient number, since it is larger than the sum of its proper divisors (1).

66000007 is an equidigital number, since it uses as much as digits as its factorization.

66000007 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 252, while the sum is 19.

The square root of 66000007 is about 8124.0388354562. The cubic root of 66000007 is about 404.1240163494.

The spelling of 66000007 in words is "sixty-six million, seven", and thus it is an aban number and an uban number.