6604000225 has 9 divisors (see below), whose sum is σ = 8189464153. Its totient is φ = 5282875120.

The previous prime is 6604000223. The next prime is 6604000229. The reversal of 6604000225 is 5220004066.

The square root of 6604000225 is 81265.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 19651489 + 6584348736 = 4433^2 + 81144^2 .

It is not a de Polignac number, because 6604000225 - 2¹ = 6604000223 is a prime.

It is a super-2 number, since 2×6604000225² = 87225637943600101250, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 6604000225.

It is not an unprimeable number, because it can be changed into a prime (6604000223) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 398199 + ... + 414451.

Almost surely, 2^6604000225 is an apocalyptic number.

6604000225 is the 81265-th square number.

6604000225 is the 40633-rd centered octagonal number.

It is an amenable number.

6604000225 is a deficient number, since it is larger than the sum of its proper divisors (1585463928).

6604000225 is an frugal number, since it uses more digits than its factorization.

6604000225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32516 (or 16258 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 25.

The cubic root of 6604000225 is about 1876.1563450857.

Multiplying 6604000225 by its sum of digits (25), we get a square (165100005625 = 406325²).

6604000225 divided by its sum of digits (25) gives a square (264160009 = 16253²).

The spelling of 6604000225 in words is "six billion, six hundred four million, two hundred twenty-five", and thus it is an aban number.