6621453630 has 48 divisors (see below), whose sum is σ = 18780853104. Its totient is φ = 1605200640.

The previous prime is 6621453589. The next prime is 6621453637. The reversal of 6621453630 is 363541266.

6621453630 is a `hidden beast` number, since 6 + 6 + 2 + 14 + 5 + 3 + 630 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6621453637) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3343179 + ... + 3345158.

It is an arithmetic number, because the mean of its divisors is an integer number (391267773).

Almost surely, 2^6621453630 is an apocalyptic number.

6621453630 is an abundant number, since it is smaller than the sum of its proper divisors (12159399474).

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

6621453630 is a wasteful number, since it uses less digits than its factorization.

6621453630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6688361 (or 6688358 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 36.

The square root of 6621453630 is about 81372.3148865755. The cubic root of 6621453630 is about 1877.8076932926.

Adding to 6621453630 its reverse (363541266), we get a palindrome (6984994896).

The spelling of 6621453630 in words is "six billion, six hundred twenty-one million, four hundred fifty-three thousand, six hundred thirty".