13541788066 has 4 divisors (see below), whose sum is σ = 20312682102. Its totient is φ = 6770894032.

The previous prime is 13541788021. The next prime is 13541788079. The reversal of 13541788066 is 66088714531.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 8490701025 + 5051087041 = 92145^2 + 71071^2 .

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3385447015 + ... + 3385447018.

Almost surely, 2^13541788066 is an apocalyptic number.

13541788066 is a deficient number, since it is larger than the sum of its proper divisors (6770894036).

13541788066 is an equidigital number, since it uses as much as digits as its factorization.

13541788066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6770894035.

The product of its (nonzero) digits is 967680, while the sum is 49.

The spelling of 13541788066 in words is "thirteen billion, five hundred forty-one million, seven hundred eighty-eight thousand, sixty-six".