13957011666 has 96 divisors (see below), whose sum is σ = 33825617280. Its totient is φ = 4287717504.

The previous prime is 13957011637. The next prime is 13957011683. The reversal of 13957011666 is 66611075931.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 5299486 + ... + 5302118.

It is an arithmetic number, because the mean of its divisors is an integer number (352350180).

Almost surely, 2^13957011666 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13957011666, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16912808640).

13957011666 is an abundant number, since it is smaller than the sum of its proper divisors (19868605614).

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

13957011666 is a wasteful number, since it uses less digits than its factorization.

13957011666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3502 (or 3490 counting only the distinct ones).

The product of its (nonzero) digits is 204120, while the sum is 45.

The spelling of 13957011666 in words is "thirteen billion, nine hundred fifty-seven million, eleven thousand, six hundred sixty-six".