13660542505 has 16 divisors (see below), whose sum is σ = 17090377920. Its totient is φ = 10472874048.

The previous prime is 13660542503. The next prime is 13660542517. The reversal of 13660542505 is 50524506631.

It is a cyclic number.

It is not a de Polignac number, because 13660542505 - 2¹ = 13660542503 is a prime.

It is a super-2 number, since 2×13660542505² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (13660542503) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 588015 + ... + 610804.

It is an arithmetic number, because the mean of its divisors is an integer number (1068148620).

Almost surely, 2^13660542505 is an apocalyptic number.

It is an amenable number.

13660542505 is a deficient number, since it is larger than the sum of its proper divisors (3429835415).

13660542505 is a wasteful number, since it uses less digits than its factorization.

13660542505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1198920.

The product of its (nonzero) digits is 108000, while the sum is 37.

The spelling of 13660542505 in words is "thirteen billion, six hundred sixty million, five hundred forty-two thousand, five hundred five".