13903105666 has 16 divisors (see below), whose sum is σ = 21023595000. Its totient is φ = 6895369728.

The previous prime is 13903105661. The next prime is 13903105679. The reversal of 13903105666 is 66650130931.

It can be written as a sum of positive squares in 4 ways, for example, as 11273980041 + 2629125625 = 106179^2 + 51275^2 .

It is a super-2 number, since 2×13903105666² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (13903105661) 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, 186610 + ... + 250258.

Almost surely, 2^13903105666 is an apocalyptic number.

13903105666 is a deficient number, since it is larger than the sum of its proper divisors (7120489334).

13903105666 is a wasteful number, since it uses less digits than its factorization.

13903105666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64533.

The product of its (nonzero) digits is 87480, while the sum is 40.

The spelling of 13903105666 in words is "thirteen billion, nine hundred three million, one hundred five thousand, six hundred sixty-six".