6646169 has 4 divisors (see below), whose sum is σ = 6652800. Its totient is φ = 6639540.

The previous prime is 6646163. The next prime is 6646193. The reversal of 6646169 is 9616466.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 9616466 = 2 ⋅4808233.

It is a cyclic number.

It is not a de Polignac number, because 6646169 - 2⁴ = 6646153 is a prime.

It is a super-2 number, since 2×6646169² = 88343124753122, which contains 22 as substring.

It is a Duffinian 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 3 ways as a sum of consecutive naturals, for example, 1469 + ... + 3930.

It is an arithmetic number, because the mean of its divisors is an integer number (1663200).

Almost surely, 2^6646169 is an apocalyptic number.

It is an amenable number.

6646169 is a deficient number, since it is larger than the sum of its proper divisors (6631).

6646169 is a wasteful number, since it uses less digits than its factorization.

6646169 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6630.

The product of its digits is 46656, while the sum is 38.

The square root of 6646169 is about 2578.0164855951. The cubic root of 6646169 is about 188.0141173192.

The spelling of 6646169 in words is "six million, six hundred forty-six thousand, one hundred sixty-nine".