66065653025 has 6 divisors (see below), whose sum is σ = 81921409782. Its totient is φ = 52852522400.

The previous prime is 66065652931. The next prime is 66065653039. The reversal of 66065653025 is 52035656066.

It can be written as a sum of positive squares in 3 ways, for example, as 6161622016 + 59904031009 = 78496^2 + 244753^2 .

It is not a de Polignac number, because 66065653025 - 2⁸ = 66065652769 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1321313036 + ... + 1321313085.

It is an arithmetic number, because the mean of its divisors is an integer number (13653568297).

Almost surely, 2^66065653025 is an apocalyptic number.

It is an amenable number.

66065653025 is a deficient number, since it is larger than the sum of its proper divisors (15855756757).

66065653025 is a wasteful number, since it uses less digits than its factorization.

66065653025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2642626131 (or 2642626126 counting only the distinct ones).

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

The spelling of 66065653025 in words is "sixty-six billion, sixty-five million, six hundred fifty-three thousand, twenty-five".