13466003561 has 4 divisors (see below), whose sum is σ = 13524807300. Its totient is φ = 13407199824.

The previous prime is 13466003543. The next prime is 13466003623. The reversal of 13466003561 is 16530066431.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 11589814336 + 1876189225 = 107656^2 + 43315^2 .

It is a cyclic number.

It is not a de Polignac number, because 13466003561 - 2¹⁴ = 13465987177 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13466003261) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29401526 + ... + 29401983.

It is an arithmetic number, because the mean of its divisors is an integer number (3381201825).

Almost surely, 2^13466003561 is an apocalyptic number.

It is an amenable number.

13466003561 is a deficient number, since it is larger than the sum of its proper divisors (58803739).

13466003561 is an equidigital number, since it uses as much as digits as its factorization.

13466003561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58803738.

The product of its (nonzero) digits is 38880, while the sum is 35.

Adding to 13466003561 its reverse (16530066431), we get a palindrome (29996069992).

The spelling of 13466003561 in words is "thirteen billion, four hundred sixty-six million, three thousand, five hundred sixty-one".