13971366660 has 48 divisors (see below), whose sum is σ = 39132527616. Its totient is φ = 3724488192.

The previous prime is 13971366659. The next prime is 13971366667. The reversal of 13971366660 is 6666317931.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (13971366667) 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, 156829 + ... + 229211.

It is an arithmetic number, because the mean of its divisors is an integer number (815260992).

Almost surely, 2^13971366660 is an apocalyptic number.

13971366660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13971366660 is an abundant number, since it is smaller than the sum of its proper divisors (25161160956).

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

13971366660 is a wasteful number, since it uses less digits than its factorization.

13971366660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75612 (or 75610 counting only the distinct ones).

The product of its (nonzero) digits is 734832, while the sum is 48.

The spelling of 13971366660 in words is "thirteen billion, nine hundred seventy-one million, three hundred sixty-six thousand, six hundred sixty".