13105666605 has 64 divisors (see below), whose sum is σ = 22980319488. Its totient is φ = 6351421440.

The previous prime is 13105666603. The next prime is 13105666621. The reversal of 13105666605 is 50666650131.

It is not a de Polignac number, because 13105666605 - 2¹ = 13105666603 is a prime.

It is a super-2 number, since 2×13105666605² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13105666601) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1007674 + ... + 1020596.

It is an arithmetic number, because the mean of its divisors is an integer number (359067492).

Almost surely, 2^13105666605 is an apocalyptic number.

13105666605 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

13105666605 is a deficient number, since it is larger than the sum of its proper divisors (9874652883).

13105666605 is a wasteful number, since it uses less digits than its factorization.

13105666605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13086.

The product of its (nonzero) digits is 97200, while the sum is 39.

The spelling of 13105666605 in words is "thirteen billion, one hundred five million, six hundred sixty-six thousand, six hundred five".