13454166566 has 4 divisors (see below), whose sum is σ = 20181249852. Its totient is φ = 6727083282.

The previous prime is 13454166559. The next prime is 13454166569. The reversal of 13454166566 is 66566145431.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 66566145431 = 7669 ⋅8679899.

It is a self number, because there is not a number n which added to its sum of digits gives 13454166566.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13454166569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3363541640 + ... + 3363541643.

It is an arithmetic number, because the mean of its divisors is an integer number (5045312463).

Almost surely, 2^13454166566 is an apocalyptic number.

13454166566 is a deficient number, since it is larger than the sum of its proper divisors (6727083286).

13454166566 is an equidigital number, since it uses as much as digits as its factorization.

13454166566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6727083285.

The product of its digits is 1555200, while the sum is 47.

The spelling of 13454166566 in words is "thirteen billion, four hundred fifty-four million, one hundred sixty-six thousand, five hundred sixty-six".