6666166 has 8 divisors (see below), whose sum is σ = 10768464. Its totient is φ = 3076680.

The previous prime is 6666157. The next prime is 6666167. The reversal of 6666166 is 6616666.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6666167) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 128170 + ... + 128221.

It is an arithmetic number, because the mean of its divisors is an integer number (1346058).

Almost surely, 2^6666166 is an apocalyptic number.

6666166 is a deficient number, since it is larger than the sum of its proper divisors (4102298).

6666166 is a wasteful number, since it uses less digits than its factorization.

6666166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 256406.

The product of its digits is 46656, while the sum is 37.

The square root of 6666166 is about 2581.8919419681. The cubic root of 6666166 is about 188.2024942045.

The spelling of 6666166 in words is "six million, six hundred sixty-six thousand, one hundred sixty-six".