13905978066 has 48 divisors (see below), whose sum is σ = 31882481280. Its totient is φ = 4371333120.

The previous prime is 13905978061. The next prime is 13905978067. The reversal of 13905978066 is 66087950931.

It is not an unprimeable number, because it can be changed into a prime (13905978061) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 207151 + ... + 265938.

It is an arithmetic number, because the mean of its divisors is an integer number (664218360).

Almost surely, 2^13905978066 is an apocalyptic number.

13905978066 is an abundant number, since it is smaller than the sum of its proper divisors (17976503214).

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

13905978066 is a wasteful number, since it uses less digits than its factorization.

13905978066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 473191 (or 473188 counting only the distinct ones).

The product of its (nonzero) digits is 2449440, while the sum is 54.

The spelling of 13905978066 in words is "thirteen billion, nine hundred five million, nine hundred seventy-eight thousand, sixty-six".