205532666 has 16 divisors (see below), whose sum is σ = 319507200. Its totient is φ = 99056640.

The previous prime is 205532653. The next prime is 205532681. The reversal of 205532666 is 666235502.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9485 + ... + 22383.

It is an arithmetic number, because the mean of its divisors is an integer number (19969200).

Almost surely, 2^205532666 is an apocalyptic number.

205532666 is a deficient number, since it is larger than the sum of its proper divisors (113974534).

205532666 is a wasteful number, since it uses less digits than its factorization.

205532666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13189.

The product of its (nonzero) digits is 64800, while the sum is 35.

The square root of 205532666 is about 14336.4104991452. The cubic root of 205532666 is about 590.1471106878.

The spelling of 205532666 in words is "two hundred five million, five hundred thirty-two thousand, six hundred sixty-six".