66280755025 has 12 divisors (see below), whose sum is σ = 82214566924. Its totient is φ = 53007552000.

The previous prime is 66280755007. The next prime is 66280755049. The reversal of 66280755025 is 52055708266.

It can be written as a sum of positive squares in 6 ways, for example, as 26924543569 + 39356211456 = 164087^2 + 198384^2 .

It is not a de Polignac number, because 66280755025 - 2²⁷ = 66146537297 is a prime.

It is a hoax number, since the sum of its digits (46) coincides with the sum of the digits of its distinct prime factors.

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 11 ways as a sum of consecutive naturals, for example, 346716 + ... + 502765.

Almost surely, 2^66280755025 is an apocalyptic number.

It is an amenable number.

66280755025 is a deficient number, since it is larger than the sum of its proper divisors (15933811899).

66280755025 is a wasteful number, since it uses less digits than its factorization.

66280755025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 852612 (or 852607 counting only the distinct ones).

The product of its (nonzero) digits is 1008000, while the sum is 46.

The spelling of 66280755025 in words is "sixty-six billion, two hundred eighty million, seven hundred fifty-five thousand, twenty-five".