66895625 has 10 divisors (see below), whose sum is σ = 83593554. Its totient is φ = 53516000.

The previous prime is 66895603. The next prime is 66895627. The reversal of 66895625 is 52659866.

It can be written as a sum of positive squares in 5 ways, for example, as 12313081 + 54582544 = 3509^2 + 7388^2 .

It is not a de Polignac number, because 66895625 - 2²⁰ = 65847049 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 66895625.

It is not an unprimeable number, because it can be changed into a prime (66895627) 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 9 ways as a sum of consecutive naturals, for example, 52892 + ... + 54141.

Almost surely, 2^66895625 is an apocalyptic number.

It is an amenable number.

66895625 is a deficient number, since it is larger than the sum of its proper divisors (16697929).

66895625 is an equidigital number, since it uses as much as digits as its factorization.

66895625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107053 (or 107038 counting only the distinct ones).

The product of its digits is 777600, while the sum is 47.

The square root of 66895625 is about 8178.9745689787. The cubic root of 66895625 is about 405.9437929260.

The spelling of 66895625 in words is "sixty-six million, eight hundred ninety-five thousand, six hundred twenty-five".