66225055025 has 6 divisors (see below), whose sum is σ = 82119068262. Its totient is φ = 52980044000.

The previous prime is 66225055021. The next prime is 66225055031. The reversal of 66225055025 is 52055052266.

66225055025 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 797554081 + 65427500944 = 28241^2 + 255788^2 .

It is not a de Polignac number, because 66225055025 - 2² = 66225055021 is a prime.

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 66225055025.

It is not an unprimeable number, because it can be changed into a prime (66225055021) 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, 1324501076 + ... + 1324501125.

It is an arithmetic number, because the mean of its divisors is an integer number (13686511377).

Almost surely, 2^66225055025 is an apocalyptic number.

It is an amenable number.

66225055025 is a deficient number, since it is larger than the sum of its proper divisors (15894013237).

66225055025 is a wasteful number, since it uses less digits than its factorization.

66225055025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2649002211 (or 2649002206 counting only the distinct ones).

The product of its (nonzero) digits is 180000, while the sum is 38.

The spelling of 66225055025 in words is "sixty-six billion, two hundred twenty-five million, fifty-five thousand, twenty-five".