6444166 has 4 divisors (see below), whose sum is σ = 9666252. Its totient is φ = 3222082.

The previous prime is 6444161. The next prime is 6444167. The reversal of 6444166 is 6614446.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6614446 = 2 ⋅3307223.

It is a super-3 number, since 3×6444166³ (a number of 21 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6444161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1611040 + ... + 1611043.

It is an arithmetic number, because the mean of its divisors is an integer number (2416563).

Almost surely, 2^6444166 is an apocalyptic number.

6444166 is a deficient number, since it is larger than the sum of its proper divisors (3222086).

6444166 is a wasteful number, since it uses less digits than its factorization.

6444166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3222085.

The product of its digits is 13824, while the sum is 31.

The square root of 6444166 is about 2538.5361923754. The cubic root of 6444166 is about 186.0896588592.

The spelling of 6444166 in words is "six million, four hundred forty-four thousand, one hundred sixty-six".