66701071201 has 2 divisors, whose sum is σ = 66701071202. Its totient is φ = 66701071200.

The previous prime is 66701071187. The next prime is 66701071211. The reversal of 66701071201 is 10217010766.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 65433640000 + 1267431201 = 255800^2 + 35601^2 .

It is a cyclic number.

It is not a de Polignac number, because 66701071201 - 2²¹ = 66698974049 is a prime.

It is not a weakly prime, because it can be changed into another prime (66701071211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33350535600 + 33350535601.

It is an arithmetic number, because the mean of its divisors is an integer number (33350535601).

Almost surely, 2^66701071201 is an apocalyptic number.

It is an amenable number.

66701071201 is a deficient number, since it is larger than the sum of its proper divisors (1).

66701071201 is an equidigital number, since it uses as much as digits as its factorization.

66701071201 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3528, while the sum is 31.

Adding to 66701071201 its reverse (10217010766), we get a palindrome (76918081967).

The spelling of 66701071201 in words is "sixty-six billion, seven hundred one million, seventy-one thousand, two hundred one".