16666262640166 has 32 divisors (see below), whose sum is σ = 26839736171712. Its totient is φ = 7734138086400.

The previous prime is 16666262640163. The next prime is 16666262640179. The reversal of 16666262640166 is 66104626266661.

It is a self number, because there is not a number n which added to its sum of digits gives 16666262640166.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16666262640163) 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, 11144281 + ... + 12550996.

It is an arithmetic number, because the mean of its divisors is an integer number (838741755366).

Almost surely, 2^{16666262640166} is an apocalyptic number.

16666262640166 is a deficient number, since it is larger than the sum of its proper divisors (10173473531546).

16666262640166 is a wasteful number, since it uses less digits than its factorization.

16666262640166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23695584.

The product of its (nonzero) digits is 26873856, while the sum is 58.

The spelling of 16666262640166 in words is "sixteen trillion, six hundred sixty-six billion, two hundred sixty-two million, six hundred forty thousand, one hundred sixty-six".