66457825 has 24 divisors (see below), whose sum is σ = 94563392. Its totient is φ = 45385920.

The previous prime is 66457819. The next prime is 66457829. The reversal of 66457825 is 52875466.

66457825 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 66457825 - 2¹¹ = 66455777 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66457829) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 53107 + ... + 54343.

Almost surely, 2^66457825 is an apocalyptic number.

It is an amenable number.

66457825 is a deficient number, since it is larger than the sum of its proper divisors (28105567).

66457825 is a wasteful number, since it uses less digits than its factorization.

66457825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1561 (or 1556 counting only the distinct ones).

The product of its digits is 403200, while the sum is 43.

The square root of 66457825 is about 8152.1668898520. The cubic root of 66457825 is about 405.0562844095.

The spelling of 66457825 in words is "sixty-six million, four hundred fifty-seven thousand, eight hundred twenty-five".