6641166 has 40 divisors (see below), whose sum is σ = 15528744. Its totient is φ = 1893360.

The previous prime is 6641153. The next prime is 6641177. The reversal of 6641166 is 6611466.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 14176 + ... + 14636.

Almost surely, 2^6641166 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6641166, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7764372).

6641166 is an abundant number, since it is smaller than the sum of its proper divisors (8887578).

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

6641166 is an equidigital number, since it uses as much as digits as its factorization.

6641166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 494 (or 473 counting only the distinct ones).

The product of its digits is 5184, while the sum is 30.

The square root of 6641166 is about 2577.0459832917. The cubic root of 6641166 is about 187.9669286931.

It can be divided in two parts, 664 and 1166, that added together give a triangular number (1830 = T₆₀).

The spelling of 6641166 in words is "six million, six hundred forty-one thousand, one hundred sixty-six".