6630520 has 64 divisors (see below), whose sum is σ = 16511040. Its totient is φ = 2380800.

The previous prime is 6630499. The next prime is 6630523. The reversal of 6630520 is 250366.

It is a junction number, because it is equal to n+sod(n) for n = 6630491 and 6630500.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6630523) 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 15 ways as a sum of consecutive naturals, for example, 21165 + ... + 21475.

It is an arithmetic number, because the mean of its divisors is an integer number (257985).

Almost surely, 2^6630520 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6630520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8255520).

6630520 is an abundant number, since it is smaller than the sum of its proper divisors (9880520).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6630520 is a wasteful number, since it uses less digits than its factorization.

6630520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 376 (or 372 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 22.

The square root of 6630520 is about 2574.9796115698. The cubic root of 6630520 is about 187.8664359909.

Adding to 6630520 its reverse (250366), we get a palindrome (6880886).

The spelling of 6630520 in words is "six million, six hundred thirty thousand, five hundred twenty".