605561666 has 8 divisors (see below), whose sum is σ = 908576400. Its totient is φ = 302702868.

The previous prime is 605561659. The next prime is 605561669. The reversal of 605561666 is 666165506.

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

It is not an unprimeable number, because it can be changed into a prime (605561669) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28736 + ... + 45131.

It is an arithmetic number, because the mean of its divisors is an integer number (113572050).

Almost surely, 2^605561666 is an apocalyptic number.

605561666 is a deficient number, since it is larger than the sum of its proper divisors (303014734).

605561666 is a wasteful number, since it uses less digits than its factorization.

605561666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77968.

The product of its (nonzero) digits is 194400, while the sum is 41.

The square root of 605561666 is about 24608.1625888647. The cubic root of 605561666 is about 846.0307047335.

The spelling of 605561666 in words is "six hundred five million, five hundred sixty-one thousand, six hundred sixty-six".