660560025 has 12 divisors (see below), whose sum is σ = 1092126032. Its totient is φ = 352298640.

The previous prime is 660559981. The next prime is 660560029. The reversal of 660560025 is 520065066.

It is not a de Polignac number, because 660560025 - 2¹⁰ = 660559001 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 660559974 and 660560001.

It is not an unprimeable number, because it can be changed into a prime (660560029) 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 11 ways as a sum of consecutive naturals, for example, 4403659 + ... + 4403808.

Almost surely, 2^660560025 is an apocalyptic number.

It is an amenable number.

660560025 is a deficient number, since it is larger than the sum of its proper divisors (431566007).

660560025 is a wasteful number, since it uses less digits than its factorization.

660560025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8807480 (or 8807475 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 30.

The square root of 660560025 is about 25701.3623179784. The cubic root of 660560025 is about 870.9049574161.

The spelling of 660560025 in words is "six hundred sixty million, five hundred sixty thousand, twenty-five".