66575824425 has 144 divisors (see below), whose sum is σ = 134915114880. Its totient is φ = 32163120000.

The previous prime is 66575824423. The next prime is 66575824453. The reversal of 66575824425 is 52442857566.

66575824425 is a `hidden beast` number, since 6 + 6 + 57 + 582 + 4 + 4 + 2 + 5 = 666.

It is not a de Polignac number, because 66575824425 - 2¹ = 66575824423 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66575824423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 25399615 + ... + 25402235.

It is an arithmetic number, because the mean of its divisors is an integer number (936910520).

Almost surely, 2^66575824425 is an apocalyptic number.

It is an amenable number.

66575824425 is an abundant number, since it is smaller than the sum of its proper divisors (68339290455).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66575824425 is a wasteful number, since it uses less digits than its factorization.

66575824425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2973 (or 2951 counting only the distinct ones).

The product of its digits is 16128000, while the sum is 54.

The spelling of 66575824425 in words is "sixty-six billion, five hundred seventy-five million, eight hundred twenty-four thousand, four hundred twenty-five".