13666356634 has 64 divisors (see below), whose sum is σ = 24446011392. Its totient is φ = 5607014400.

The previous prime is 13666356631. The next prime is 13666356713. The reversal of 13666356634 is 43665366631.

It is not an unprimeable number, because it can be changed into a prime (13666356631) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 20186304 + ... + 20186980.

It is an arithmetic number, because the mean of its divisors is an integer number (381968928).

Almost surely, 2^13666356634 is an apocalyptic number.

13666356634 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

13666356634 is a deficient number, since it is larger than the sum of its proper divisors (10779654758).

13666356634 is a wasteful number, since it uses less digits than its factorization.

13666356634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1151.

The product of its digits is 4199040, while the sum is 49.

The spelling of 13666356634 in words is "thirteen billion, six hundred sixty-six million, three hundred fifty-six thousand, six hundred thirty-four".