6620454225 has 144 divisors (see below), whose sum is σ = 15294913920. Its totient is φ = 2656281600.

The previous prime is 6620454199. The next prime is 6620454227. The reversal of 6620454225 is 5224540266.

6620454225 is a `hidden beast` number, since 6 + 620 + 4 + 5 + 4 + 2 + 25 = 666.

It is not a de Polignac number, because 6620454225 - 2⁸ = 6620453969 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 6620454225.

It is not an unprimeable number, because it can be changed into a prime (6620454227) by changing a digit.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 495837 + ... + 509013.

It is an arithmetic number, because the mean of its divisors is an integer number (106214680).

Almost surely, 2^6620454225 is an apocalyptic number.

It is an amenable number.

6620454225 is an abundant number, since it is smaller than the sum of its proper divisors (8674459695).

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

6620454225 is a wasteful number, since it uses less digits than its factorization.

6620454225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13240 (or 13232 counting only the distinct ones).

The product of its (nonzero) digits is 115200, while the sum is 36.

The square root of 6620454225 is about 81366.1737148798. The cubic root of 6620454225 is about 1877.7132132922.

The spelling of 6620454225 in words is "six billion, six hundred twenty million, four hundred fifty-four thousand, two hundred twenty-five".