266440242 has 8 divisors (see below), whose sum is σ = 532880496. Its totient is φ = 88813412.

The previous prime is 266440217. The next prime is 266440259. The reversal of 266440242 is 242044662.

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

266440242 is an admirable number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22203348 + ... + 22203359.

It is an arithmetic number, because the mean of its divisors is an integer number (66610062).

Almost surely, 2^266440242 is an apocalyptic number.

266440242 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

266440242 is a wasteful number, since it uses less digits than its factorization.

266440242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44406712.

The product of its (nonzero) digits is 18432, while the sum is 30.

The square root of 266440242 is about 16322.9973350485. The cubic root of 266440242 is about 643.4773626414.

The spelling of 266440242 in words is "two hundred sixty-six million, four hundred forty thousand, two hundred forty-two".