66207601 has 2 divisors, whose sum is σ = 66207602. Its totient is φ = 66207600.

The previous prime is 66207539. The next prime is 66207629. The reversal of 66207601 is 10670266.

It is an a-pointer prime, because the next prime (66207629) can be obtained adding 66207601 to its sum of digits (28).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 55651600 + 10556001 = 7460^2 + 3249^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66207601 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 66207601.

It is not a weakly prime, because it can be changed into another prime (66207671) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33103800 + 33103801.

It is an arithmetic number, because the mean of its divisors is an integer number (33103801).

Almost surely, 2^66207601 is an apocalyptic number.

It is an amenable number.

66207601 is a deficient number, since it is larger than the sum of its proper divisors (1).

66207601 is an equidigital number, since it uses as much as digits as its factorization.

66207601 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3024, while the sum is 28.

The square root of 66207601 is about 8136.8053313324. The cubic root of 66207601 is about 404.5472785050.

Adding to 66207601 its reverse (10670266), we get a palindrome (76877867).

The spelling of 66207601 in words is "sixty-six million, two hundred seven thousand, six hundred one".