6646166 has 16 divisors (see below), whose sum is σ = 10309200. Its totient is φ = 3211488.

The previous prime is 6646163. The next prime is 6646193. The reversal of 6646166 is 6616466.

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6646163) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9020 + ... + 9728.

It is an arithmetic number, because the mean of its divisors is an integer number (644325).

Almost surely, 2^6646166 is an apocalyptic number.

6646166 is a deficient number, since it is larger than the sum of its proper divisors (3663034).

6646166 is a wasteful number, since it uses less digits than its factorization.

6646166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 863.

The product of its digits is 31104, while the sum is 35.

The square root of 6646166 is about 2578.0159037523. The cubic root of 6646166 is about 188.0140890301.

The spelling of 6646166 in words is "six million, six hundred forty-six thousand, one hundred sixty-six".