13006635666 has 16 divisors (see below), whose sum is σ = 26019817824. Its totient is φ = 4334454144.

The previous prime is 13006635661. The next prime is 13006635673. The reversal of 13006635666 is 66653660031.

It is not an unprimeable number, because it can be changed into a prime (13006635661) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 246751 + ... + 294786.

It is an arithmetic number, because the mean of its divisors is an integer number (1626238614).

Almost surely, 2^13006635666 is an apocalyptic number.

13006635666 is an abundant number, since it is smaller than the sum of its proper divisors (13013182158).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13006635666 is a wasteful number, since it uses less digits than its factorization.

13006635666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 545545.

The product of its (nonzero) digits is 349920, while the sum is 42.

The spelling of 13006635666 in words is "thirteen billion, six million, six hundred thirty-five thousand, six hundred sixty-six".