66700201 has 2 divisors, whose sum is σ = 66700202. Its totient is φ = 66700200.

The previous prime is 66700177. The next prime is 66700217. The reversal of 66700201 is 10200766.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 53304601 + 13395600 = 7301^2 + 3660^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66700201 is a prime.

It is not a weakly prime, because it can be changed into another prime (66700001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33350100 + 33350101.

It is an arithmetic number, because the mean of its divisors is an integer number (33350101).

Almost surely, 2^66700201 is an apocalyptic number.

It is an amenable number.

66700201 is a deficient number, since it is larger than the sum of its proper divisors (1).

66700201 is an equidigital number, since it uses as much as digits as its factorization.

66700201 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 504, while the sum is 22.

The square root of 66700201 is about 8167.0191012388. The cubic root of 66700201 is about 405.5481091715.

Adding to 66700201 its reverse (10200766), we get a palindrome (76900967).

The spelling of 66700201 in words is "sixty-six million, seven hundred thousand, two hundred one".