66895825 has 6 divisors (see below), whose sum is σ = 82950854. Its totient is φ = 53516640.

The previous prime is 66895819. The next prime is 66895841. The reversal of 66895825 is 52859866.

It can be written as a sum of positive squares in 3 ways, for example, as 4422609 + 62473216 = 2103^2 + 7904^2 .

It is not a de Polignac number, because 66895825 - 2³ = 66895817 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1337892 + ... + 1337941.

Almost surely, 2^66895825 is an apocalyptic number.

It is an amenable number.

66895825 is a deficient number, since it is larger than the sum of its proper divisors (16055029).

66895825 is a wasteful number, since it uses less digits than its factorization.

66895825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2675843 (or 2675838 counting only the distinct ones).

The product of its digits is 1036800, while the sum is 49.

The square root of 66895825 is about 8178.9867954411. The cubic root of 66895825 is about 405.9441974800.

The spelling of 66895825 in words is "sixty-six million, eight hundred ninety-five thousand, eight hundred twenty-five".