66245125 has 8 divisors (see below), whose sum is σ = 82674072. Its totient is φ = 52996000.

The previous prime is 66245099. The next prime is 66245143. The reversal of 66245125 is 52154266.

66245125 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 4 ways, for example, as 7001316 + 59243809 = 2646^2 + 7697^2 .

It is not a de Polignac number, because 66245125 - 2⁵ = 66245093 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 264856 + ... + 265105.

It is an arithmetic number, because the mean of its divisors is an integer number (10334259).

Almost surely, 2^66245125 is an apocalyptic number.

It is an amenable number.

66245125 is a deficient number, since it is larger than the sum of its proper divisors (16428947).

66245125 is an equidigital number, since it uses as much as digits as its factorization.

66245125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 529976 (or 529966 counting only the distinct ones).

The product of its digits is 14400, while the sum is 31.

The square root of 66245125 is about 8139.1108236711. The cubic root of 66245125 is about 404.6236915094.

The spelling of 66245125 in words is "sixty-six million, two hundred forty-five thousand, one hundred twenty-five".