6604758225 has 168 divisors, whose sum is σ = 13469983352. Its totient is φ = 3191270400.

The previous prime is 6604758221. The next prime is 6604758233. The reversal of 6604758225 is 5228574066.

6604758225 is a `hidden beast` number, since 6 + 6 + 0 + 47 + 582 + 25 = 666.

It can be written as a sum of positive squares in 12 ways, for example, as 3579868224 + 3024890001 = 59832^2 + 54999^2 .

It is not a de Polignac number, because 6604758225 - 2² = 6604758221 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6604758221) by changing a digit.

It is a polite number, since it can be written in 167 ways as a sum of consecutive naturals, for example, 14452197 + ... + 14452653.

Almost surely, 2^6604758225 is an apocalyptic number.

6604758225 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

6604758225 is an abundant number, since it is smaller than the sum of its proper divisors (6865225127).

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

6604758225 is a wasteful number, since it uses less digits than its factorization.

6604758225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 559 (or 539 counting only the distinct ones).

The product of its (nonzero) digits is 806400, while the sum is 45.

The square root of 6604758225 is about 81269.6636205663. The cubic root of 6604758225 is about 1876.2281234046.

The spelling of 6604758225 in words is "six billion, six hundred four million, seven hundred fifty-eight thousand, two hundred twenty-five".