205407668 has 12 divisors (see below), whose sum is σ = 380608452. Its totient is φ = 96662400.

The previous prime is 205407659. The next prime is 205407673. The reversal of 205407668 is 866704502.

It is a happy number.

205407668 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 159466384 + 45941284 = 12628^2 + 6778^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1510283 + ... + 1510418.

It is an arithmetic number, because the mean of its divisors is an integer number (31717371).

Almost surely, 2^205407668 is an apocalyptic number.

It is an amenable number.

205407668 is a deficient number, since it is larger than the sum of its proper divisors (175200784).

205407668 is a wasteful number, since it uses less digits than its factorization.

205407668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3020722 (or 3020720 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 38.

The square root of 205407668 is about 14332.0503766907. The cubic root of 205407668 is about 590.0274506044.

The spelling of 205407668 in words is "two hundred five million, four hundred seven thousand, six hundred sixty-eight".