66620264800241 has 2 divisors, whose sum is σ = 66620264800242. Its totient is φ = 66620264800240.

The previous prime is 66620264800231. The next prime is 66620264800319. The reversal of 66620264800241 is 14200846202666.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 49712370490000 + 16907894310241 = 7050700^2 + 4111921^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66620264800241 is a prime.

It is not a weakly prime, because it can be changed into another prime (66620264800231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33310132400120 + 33310132400121.

It is an arithmetic number, because the mean of its divisors is an integer number (33310132400121).

Almost surely, 2^{66620264800241} is an apocalyptic number.

It is an amenable number.

66620264800241 is a deficient number, since it is larger than the sum of its proper divisors (1).

66620264800241 is an equidigital number, since it uses as much as digits as its factorization.

66620264800241 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1327104, while the sum is 47.

The spelling of 66620264800241 in words is "sixty-six trillion, six hundred twenty billion, two hundred sixty-four million, eight hundred thousand, two hundred forty-one".