13666908540 has 48 divisors (see below), whose sum is σ = 38405539872. Its totient is φ = 3631347456.

The previous prime is 13666908539. The next prime is 13666908551. The reversal of 13666908540 is 4580966631.

It is a self number, because there is not a number n which added to its sum of digits gives 13666908540.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 394539 + ... + 427778.

It is an arithmetic number, because the mean of its divisors is an integer number (800115414).

Almost surely, 2^13666908540 is an apocalyptic number.

13666908540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13666908540 is an abundant number, since it is smaller than the sum of its proper divisors (24738631332).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13666908540 is a wasteful number, since it uses less digits than its factorization.

13666908540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 822606 (or 822604 counting only the distinct ones).

The product of its (nonzero) digits is 933120, while the sum is 48.

The spelling of 13666908540 in words is "thirteen billion, six hundred sixty-six million, nine hundred eight thousand, five hundred forty".