166503004301201 has 2 divisors, whose sum is σ = 166503004301202. Its totient is φ = 166503004301200.

The previous prime is 166503004301191. The next prime is 166503004301239. The reversal of 166503004301201 is 102103400305661.

166503004301201 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 134721868650625 + 31781135650576 = 11606975^2 + 5637476^2 .

It is a cyclic number.

It is not a de Polignac number, because 166503004301201 - 2¹⁰ = 166503004300177 is a prime.

It is not a weakly prime, because it can be changed into another prime (166503004301801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83251502150600 + 83251502150601.

It is an arithmetic number, because the mean of its divisors is an integer number (83251502150601).

Almost surely, 2^{166503004301201} is an apocalyptic number.

It is an amenable number.

166503004301201 is a deficient number, since it is larger than the sum of its proper divisors (1).

166503004301201 is an equidigital number, since it uses as much as digits as its factorization.

166503004301201 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12960, while the sum is 32.

Adding to 166503004301201 its reverse (102103400305661), we get a palindrome (268606404606862).

The spelling of 166503004301201 in words is "one hundred sixty-six trillion, five hundred three billion, four million, three hundred one thousand, two hundred one".