6648629 has 6 divisors (see below), whose sum is σ = 7199586. Its totient is φ = 6137040.

The previous prime is 6648623. The next prime is 6648637. The reversal of 6648629 is 9268466.

It can be written as a sum of positive squares in 3 ways, for example, as 532900 + 6115729 = 730^2 + 2473^2 .

It is a de Polignac number, because none of the positive numbers 2^k-6648629 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6648623) 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 5 ways as a sum of consecutive naturals, for example, 19502 + ... + 19839.

It is an arithmetic number, because the mean of its divisors is an integer number (1199931).

Almost surely, 2^6648629 is an apocalyptic number.

It is an amenable number.

6648629 is a deficient number, since it is larger than the sum of its proper divisors (550957).

6648629 is a wasteful number, since it uses less digits than its factorization.

6648629 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39367 (or 39354 counting only the distinct ones).

The product of its digits is 124416, while the sum is 41.

The square root of 6648629 is about 2578.4935524449. The cubic root of 6648629 is about 188.0373115171.

The spelling of 6648629 in words is "six million, six hundred forty-eight thousand, six hundred twenty-nine".