13666575401 has 4 divisors (see below), whose sum is σ = 14107432704. Its totient is φ = 13225718100.

The previous prime is 13666575317. The next prime is 13666575431. The reversal of 13666575401 is 10457566631.

13666575401 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 10457566631 = 463 ⋅22586537.

It is a cyclic number.

It is not a de Polignac number, because 13666575401 - 2²⁶ = 13599466537 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13666575431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 220428605 + ... + 220428666.

It is an arithmetic number, because the mean of its divisors is an integer number (3526858176).

Almost surely, 2^13666575401 is an apocalyptic number.

It is an amenable number.

13666575401 is a deficient number, since it is larger than the sum of its proper divisors (440857303).

13666575401 is an equidigital number, since it uses as much as digits as its factorization.

13666575401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 440857302.

The product of its (nonzero) digits is 453600, while the sum is 44.

The spelling of 13666575401 in words is "thirteen billion, six hundred sixty-six million, five hundred seventy-five thousand, four hundred one".