6650665325 has 6 divisors (see below), whose sum is σ = 8246825034. Its totient is φ = 5320532240.

The previous prime is 6650665313. The next prime is 6650665327. The reversal of 6650665325 is 5235660566.

It can be written as a sum of positive squares in 3 ways, for example, as 1160151721 + 5490513604 = 34061^2 + 74098^2 .

It is not a de Polignac number, because 6650665325 - 2¹⁰ = 6650664301 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6650665327) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 133013282 + ... + 133013331.

It is an arithmetic number, because the mean of its divisors is an integer number (1374470839).

Almost surely, 2^6650665325 is an apocalyptic number.

It is an amenable number.

6650665325 is a deficient number, since it is larger than the sum of its proper divisors (1596159709).

6650665325 is a wasteful number, since it uses less digits than its factorization.

6650665325 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 266026623 (or 266026618 counting only the distinct ones).

The product of its (nonzero) digits is 972000, while the sum is 44.

The square root of 6650665325 is about 81551.6114187819. The cubic root of 6650665325 is about 1880.5650675230.

The spelling of 6650665325 in words is "six billion, six hundred fifty million, six hundred sixty-five thousand, three hundred twenty-five".