66498625 has 8 divisors (see below), whose sum is σ = 82990440. Its totient is φ = 53198800.

The previous prime is 66498617. The next prime is 66498629. The reversal of 66498625 is 52689466.

66498625 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 173889 + 66324736 = 417^2 + 8144^2 .

It is not a de Polignac number, because 66498625 - 2³ = 66498617 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66498629) 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 7 ways as a sum of consecutive naturals, for example, 265870 + ... + 266119.

It is an arithmetic number, because the mean of its divisors is an integer number (10373805).

Almost surely, 2^66498625 is an apocalyptic number.

It is an amenable number.

66498625 is a deficient number, since it is larger than the sum of its proper divisors (16491815).

66498625 is an equidigital number, since it uses as much as digits as its factorization.

66498625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 532004 (or 531994 counting only the distinct ones).

The product of its digits is 622080, while the sum is 46.

The square root of 66498625 is about 8154.6689080551. The cubic root of 66498625 is about 405.1391586012.

The spelling of 66498625 in words is "sixty-six million, four hundred ninety-eight thousand, six hundred twenty-five".