6646969 has 4 divisors (see below), whose sum is σ = 7596544. Its totient is φ = 5697396.

The previous prime is 6646967. The next prime is 6646973. The reversal of 6646969 is 9696466.

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.

It is a cyclic number.

It is not a de Polignac number, because 6646969 - 2¹ = 6646967 is a prime.

It is a super-2 number, since 2×6646969² = 88364393773922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6646967) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 474777 + ... + 474790.

It is an arithmetic number, because the mean of its divisors is an integer number (1899136).

Almost surely, 2^6646969 is an apocalyptic number.

It is an amenable number.

6646969 is a deficient number, since it is larger than the sum of its proper divisors (949575).

6646969 is an equidigital number, since it uses as much as digits as its factorization.

6646969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 949574.

The product of its digits is 419904, while the sum is 46.

The square root of 6646969 is about 2578.1716389721. The cubic root of 6646969 is about 188.0216607757.

The spelling of 6646969 in words is "six million, six hundred forty-six thousand, nine hundred sixty-nine".