205660625 has 20 divisors (see below), whose sum is σ = 259117056. Its totient is φ = 163170000.

The previous prime is 205660619. The next prime is 205660627. The reversal of 205660625 is 526066502.

It is not a de Polignac number, because 205660625 - 2²⁰ = 204612049 is a prime.

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 205660591 and 205660600.

It is not an unprimeable number, because it can be changed into a prime (205660627) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 78080 + ... + 80670.

Almost surely, 2^205660625 is an apocalyptic number.

205660625 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

205660625 is a deficient number, since it is larger than the sum of its proper divisors (53456431).

205660625 is an equidigital number, since it uses as much as digits as its factorization.

205660625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2738 (or 2723 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 32.

The square root of 205660625 is about 14340.8725327297. The cubic root of 205660625 is about 590.2695550822.

The spelling of 205660625 in words is "two hundred five million, six hundred sixty thousand, six hundred twenty-five".