66123393225 has 12 divisors (see below), whose sum is σ = 109324010256. Its totient is φ = 35265809680.

The previous prime is 66123393223. The next prime is 66123393241. The reversal of 66123393225 is 52239332166.

66123393225 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 66123393225 - 2¹ = 66123393223 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66123393221) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 440822547 + ... + 440822696.

It is an arithmetic number, because the mean of its divisors is an integer number (9110334188).

Almost surely, 2^66123393225 is an apocalyptic number.

It is an amenable number.

66123393225 is a deficient number, since it is larger than the sum of its proper divisors (43200617031).

66123393225 is a wasteful number, since it uses less digits than its factorization.

66123393225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 881645256 (or 881645251 counting only the distinct ones).

The product of its digits is 349920, while the sum is 42.

The spelling of 66123393225 in words is "sixty-six billion, one hundred twenty-three million, three hundred ninety-three thousand, two hundred twenty-five".