6649929 has 24 divisors (see below), whose sum is σ = 11286912. Its totient is φ = 3719520.

The previous prime is 6649919. The next prime is 6649999. The reversal of 6649929 is 9299466.

It is not a de Polignac number, because 6649929 - 2⁷ = 6649801 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (6649919) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 1297 + ... + 3870.

It is an arithmetic number, because the mean of its divisors is an integer number (470288).

Almost surely, 2^6649929 is an apocalyptic number.

It is an amenable number.

6649929 is a deficient number, since it is larger than the sum of its proper divisors (4636983).

6649929 is a wasteful number, since it uses less digits than its factorization.

6649929 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5197 (or 5194 counting only the distinct ones).

The product of its digits is 209952, while the sum is 45.

The square root of 6649929 is about 2578.7456252992. The cubic root of 6649929 is about 188.0495663029.

The spelling of 6649929 in words is "six million, six hundred forty-nine thousand, nine hundred twenty-nine".