6646223 has 8 divisors (see below), whose sum is σ = 6955200. Its totient is φ = 6344320.

The previous prime is 6646217. The next prime is 6646231. The reversal of 6646223 is 3226466.

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

It is a cyclic number.

It is not a de Polignac number, because 6646223 - 2⁴ = 6646207 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6640223) 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, 203 + ... + 3651.

It is an arithmetic number, because the mean of its divisors is an integer number (869400).

Almost surely, 2^6646223 is an apocalyptic number.

6646223 is a deficient number, since it is larger than the sum of its proper divisors (308977).

6646223 is a wasteful number, since it uses less digits than its factorization.

6646223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3537.

The product of its digits is 10368, while the sum is 29.

The square root of 6646223 is about 2578.0269587419. The cubic root of 6646223 is about 188.0146265216.

It can be divided in two parts, 66462 and 23, that multiplied together give a triangular number (1528626 = T₁₇₄₈).

The spelling of 6646223 in words is "six million, six hundred forty-six thousand, two hundred twenty-three".