66266043225 has 48 divisors (see below), whose sum is σ = 111481823040. Its totient is φ = 34722604800.

The previous prime is 66266043223. The next prime is 66266043251. The reversal of 66266043225 is 52234066266.

It is not a de Polignac number, because 66266043225 - 2¹ = 66266043223 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66266043223) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 10355727 + ... + 10362123.

It is an arithmetic number, because the mean of its divisors is an integer number (2322537980).

Almost surely, 2^66266043225 is an apocalyptic number.

It is an amenable number.

66266043225 is a deficient number, since it is larger than the sum of its proper divisors (45215779815).

66266043225 is a wasteful number, since it uses less digits than its factorization.

66266043225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8810 (or 8805 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 42.

The spelling of 66266043225 in words is "sixty-six billion, two hundred sixty-six million, forty-three thousand, two hundred twenty-five".