13636244066 has 4 divisors (see below), whose sum is σ = 20454366102. Its totient is φ = 6818122032.

The previous prime is 13636244059. The next prime is 13636244081. The reversal of 13636244066 is 66044263631.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 66044263631 = 6991 ⋅9447041.

It can be written as a sum of positive squares in only one way, i.e., 9211200625 + 4425043441 = 95975^2 + 66521^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3409061015 + ... + 3409061018.

Almost surely, 2^13636244066 is an apocalyptic number.

13636244066 is a deficient number, since it is larger than the sum of its proper divisors (6818122036).

13636244066 is an equidigital number, since it uses as much as digits as its factorization.

13636244066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6818122035.

The product of its (nonzero) digits is 373248, while the sum is 41.

The spelling of 13636244066 in words is "thirteen billion, six hundred thirty-six million, two hundred forty-four thousand, sixty-six".