13661966890140 has 48 divisors (see below), whose sum is σ = 38256900756480. Its totient is φ = 3642867983680.

The previous prime is 13661966890133. The next prime is 13661966890151. The reversal of 13661966890140 is 4109866916631.

It is a Harshad number since it is a multiple of its sum of digits (60).

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, 9417216 + ... + 10770695.

It is an arithmetic number, because the mean of its divisors is an integer number (797018765760).

Almost surely, 2^{13661966890140} is an apocalyptic number.

13661966890140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13661966890140 is an abundant number, since it is smaller than the sum of its proper divisors (24594933866340).

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

13661966890140 is a wasteful number, since it uses less digits than its factorization.

13661966890140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20199202 (or 20199200 counting only the distinct ones).

The product of its (nonzero) digits is 10077696, while the sum is 60.

The spelling of 13661966890140 in words is "thirteen trillion, six hundred sixty-one billion, nine hundred sixty-six million, eight hundred ninety thousand, one hundred forty".