205442066 has 8 divisors (see below), whose sum is σ = 308254464. Its totient is φ = 102690580.

The previous prime is 205442047. The next prime is 205442077. The reversal of 205442066 is 660244502.

It is a sphenic number, since it is the product of 3 distinct primes.

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 3 ways as a sum of consecutive naturals, for example, 5570 + ... + 21021.

It is an arithmetic number, because the mean of its divisors is an integer number (38531808).

Almost surely, 2^205442066 is an apocalyptic number.

205442066 is a deficient number, since it is larger than the sum of its proper divisors (102812398).

205442066 is a wasteful number, since it uses less digits than its factorization.

205442066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30456.

The product of its (nonzero) digits is 11520, while the sum is 29.

The square root of 205442066 is about 14333.2503641009. The cubic root of 205442066 is about 590.0603845120.

Adding to 205442066 its reverse (660244502), we get a palindrome (865686568).

The spelling of 205442066 in words is "two hundred five million, four hundred forty-two thousand, sixty-six".