66063913 has 2 divisors, whose sum is σ = 66063914. Its totient is φ = 66063912.

The previous prime is 66063901. The next prime is 66063923. The reversal of 66063913 is 31936066.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 43520409 + 22543504 = 6597^2 + 4748^2 .

It is a cyclic number.

It is not a de Polignac number, because 66063913 - 2⁹ = 66063401 is a prime.

It is not a weakly prime, because it can be changed into another prime (66063923) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33031956 + 33031957.

It is an arithmetic number, because the mean of its divisors is an integer number (33031957).

Almost surely, 2^66063913 is an apocalyptic number.

It is an amenable number.

66063913 is a deficient number, since it is larger than the sum of its proper divisors (1).

66063913 is an equidigital number, since it uses as much as digits as its factorization.

66063913 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17496, while the sum is 34.

The square root of 66063913 is about 8127.9710260310. The cubic root of 66063913 is about 404.2544083475.

Adding to 66063913 its reverse (31936066), we get a palindrome (97999979).

The spelling of 66063913 in words is "sixty-six million, sixty-three thousand, nine hundred thirteen".