665970242 has 16 divisors (see below), whose sum is σ = 1146406272. Its totient is φ = 284230080.

The previous prime is 665970211. The next prime is 665970259. The reversal of 665970242 is 242079566.

665970242 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 665970242.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 95318 + ... + 102065.

It is an arithmetic number, because the mean of its divisors is an integer number (71650392).

Almost surely, 2^665970242 is an apocalyptic number.

665970242 is a deficient number, since it is larger than the sum of its proper divisors (480436030).

665970242 is a wasteful number, since it uses less digits than its factorization.

665970242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 197633.

The product of its (nonzero) digits is 181440, while the sum is 41.

The square root of 665970242 is about 25806.3992451485. The cubic root of 665970242 is about 873.2761672596.

The spelling of 665970242 in words is "six hundred sixty-five million, nine hundred seventy thousand, two hundred forty-two".