66030641 has 2 divisors, whose sum is σ = 66030642. Its totient is φ = 66030640.

The previous prime is 66030637. The next prime is 66030659. The reversal of 66030641 is 14603066.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 56550400 + 9480241 = 7520^2 + 3079^2 .

It is a cyclic number.

It is not a de Polignac number, because 66030641 - 2² = 66030637 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 66030641.

It is not a weakly prime, because it can be changed into another prime (66030611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33015320 + 33015321.

It is an arithmetic number, because the mean of its divisors is an integer number (33015321).

Almost surely, 2^66030641 is an apocalyptic number.

It is an amenable number.

66030641 is a deficient number, since it is larger than the sum of its proper divisors (1).

66030641 is an equidigital number, since it uses as much as digits as its factorization.

66030641 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2592, while the sum is 26.

The square root of 66030641 is about 8125.9240089974. The cubic root of 66030641 is about 404.1865315964.

The spelling of 66030641 in words is "sixty-six million, thirty thousand, six hundred forty-one".