66895529 has 2 divisors, whose sum is σ = 66895530. Its totient is φ = 66895528.

The previous prime is 66895501. The next prime is 66895579. The reversal of 66895529 is 92559866.

It is an a-pointer prime, because the next prime (66895579) can be obtained adding 66895529 to its sum of digits (50).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 47955625 + 18939904 = 6925^2 + 4352^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66895529 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (66895579) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33447764 + 33447765.

It is an arithmetic number, because the mean of its divisors is an integer number (33447765).

Almost surely, 2^66895529 is an apocalyptic number.

It is an amenable number.

66895529 is a deficient number, since it is larger than the sum of its proper divisors (1).

66895529 is an equidigital number, since it uses as much as digits as its factorization.

66895529 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1166400, while the sum is 50.

The square root of 66895529 is about 8178.9687002702. The cubic root of 66895529 is about 405.9435987398.

The spelling of 66895529 in words is "sixty-six million, eight hundred ninety-five thousand, five hundred twenty-nine".