6649635 has 32 divisors (see below), whose sum is σ = 11430720. Its totient is φ = 3289088.

The previous prime is 6649633. The next prime is 6649661. The reversal of 6649635 is 5369466.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 6649635 - 2¹ = 6649633 is a prime.

6649635 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 6649593 and 6649602.

It is not an unprimeable number, because it can be changed into a prime (6649631) 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 31 ways as a sum of consecutive naturals, for example, 22549 + ... + 22841.

It is an arithmetic number, because the mean of its divisors is an integer number (357210).

Almost surely, 2^6649635 is an apocalyptic number.

6649635 is a deficient number, since it is larger than the sum of its proper divisors (4781085).

6649635 is a wasteful number, since it uses less digits than its factorization.

6649635 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 407.

The product of its digits is 116640, while the sum is 39.

The square root of 6649635 is about 2578.6886202099. The cubic root of 6649635 is about 188.0467949757.

The spelling of 6649635 in words is "six million, six hundred forty-nine thousand, six hundred thirty-five".