13917666 has 24 divisors (see below), whose sum is σ = 32380560. Its totient is φ = 3976392.

The previous prime is 13917637. The next prime is 13917703. The reversal of 13917666 is 66671931.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 23376 + ... + 23963.

It is an arithmetic number, because the mean of its divisors is an integer number (1349190).

Almost surely, 2^13917666 is an apocalyptic number.

13917666 is an abundant number, since it is smaller than the sum of its proper divisors (18462894).

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

13917666 is a wasteful number, since it uses less digits than its factorization.

13917666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47358 (or 47351 counting only the distinct ones).

The product of its digits is 40824, while the sum is 39.

The square root of 13917666 is about 3730.6388192909. The cubic root of 13917666 is about 240.5408289625.

The spelling of 13917666 in words is "thirteen million, nine hundred seventeen thousand, six hundred sixty-six".