13660405642 has 16 divisors (see below), whose sum is σ = 23228220960. Its totient is φ = 5972970672.

The previous prime is 13660405579. The next prime is 13660405643. The reversal of 13660405642 is 24650406631.

It is not an unprimeable number, because it can be changed into a prime (13660405643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13825828 + ... + 13826815.

It is an arithmetic number, because the mean of its divisors is an integer number (1451763810).

Almost surely, 2^13660405642 is an apocalyptic number.

13660405642 is a deficient number, since it is larger than the sum of its proper divisors (9567815318).

13660405642 is a wasteful number, since it uses less digits than its factorization.

13660405642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27652677.

The product of its (nonzero) digits is 103680, while the sum is 37.

The spelling of 13660405642 in words is "thirteen billion, six hundred sixty million, four hundred five thousand, six hundred forty-two".