6666171502166 has 16 divisors (see below), whose sum is σ = 10975202612928. Its totient is φ = 3011488518600.

The previous prime is 6666171502147. The next prime is 6666171502187. The reversal of 6666171502166 is 6612051716666.

It is a super-4 number, since 4×6666171502166⁴ (a number of 52 digits) contains 4444 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 929468180 + ... + 929475351.

It is an arithmetic number, because the mean of its divisors is an integer number (685950163308).

Almost surely, 2^{6666171502166} is an apocalyptic number.

6666171502166 is a deficient number, since it is larger than the sum of its proper divisors (4309031110762).

6666171502166 is a wasteful number, since it uses less digits than its factorization.

6666171502166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1858943707.

The product of its (nonzero) digits is 3265920, while the sum is 53.

The spelling of 6666171502166 in words is "six trillion, six hundred sixty-six billion, one hundred seventy-one million, five hundred two thousand, one hundred sixty-six".