1326666553163 has 16 divisors (see below), whose sum is σ = 1526319552000. Its totient is φ = 1129546728000.

The previous prime is 1326666553097. The next prime is 1326666553237. The reversal of 1326666553163 is 3613556666231.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1326666553163 - 2¹⁸ = 1326666291019 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1326666553363) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30101423 + ... + 30145463.

It is an arithmetic number, because the mean of its divisors is an integer number (95394972000).

Almost surely, 2^{1326666553163} is an apocalyptic number.

1326666553163 is a deficient number, since it is larger than the sum of its proper divisors (199652998837).

1326666553163 is a wasteful number, since it uses less digits than its factorization.

1326666553163 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72698.

The product of its digits is 10497600, while the sum is 53.

The spelling of 1326666553163 in words is "one trillion, three hundred twenty-six billion, six hundred sixty-six million, five hundred fifty-three thousand, one hundred sixty-three".