660440242 has 64 divisors (see below), whose sum is σ = 1313335296. Its totient is φ = 241148160.

The previous prime is 660440227. The next prime is 660440243. The reversal of 660440242 is 242044066.

660440242 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 660440242.

It is not an unprimeable number, because it can be changed into a prime (660440243) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 908083 + ... + 908809.

It is an arithmetic number, because the mean of its divisors is an integer number (20520864).

Almost surely, 2^660440242 is an apocalyptic number.

660440242 is a deficient number, since it is larger than the sum of its proper divisors (652895054).

660440242 is a wasteful number, since it uses less digits than its factorization.

660440242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1111.

The product of its (nonzero) digits is 9216, while the sum is 28.

The square root of 660440242 is about 25699.0319272925. The cubic root of 660440242 is about 870.8523122308.

The spelling of 660440242 in words is "six hundred sixty million, four hundred forty thousand, two hundred forty-two".