665024225 has 12 divisors (see below), whose sum is σ = 868032240. Its totient is φ = 504018000.

The previous prime is 665024219. The next prime is 665024237. The reversal of 665024225 is 522420566.

It is not a de Polignac number, because 665024225 - 2⁴ = 665024209 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 665024191 and 665024200.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 699551 + ... + 700500.

It is an arithmetic number, because the mean of its divisors is an integer number (72336020).

Almost surely, 2^665024225 is an apocalyptic number.

It is an amenable number.

665024225 is a deficient number, since it is larger than the sum of its proper divisors (203008015).

665024225 is a wasteful number, since it uses less digits than its factorization.

665024225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1400080 (or 1400075 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 32.

The square root of 665024225 is about 25788.0636147812. The cubic root of 665024225 is about 872.8624723055.

The spelling of 665024225 in words is "six hundred sixty-five million, twenty-four thousand, two hundred twenty-five".