665056242 has 24 divisors (see below), whose sum is σ = 1449012240. Its totient is φ = 220445880.

The previous prime is 665056213. The next prime is 665056267. The reversal of 665056242 is 242650566.

665056242 is a `hidden beast` number, since 6 + 6 + 50 + 562 + 42 = 666.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 665056197 and 665056206.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 99984 + ... + 106427.

It is an arithmetic number, because the mean of its divisors is an integer number (60375510).

Almost surely, 2^665056242 is an apocalyptic number.

665056242 is an abundant number, since it is smaller than the sum of its proper divisors (783955998).

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

665056242 is a wasteful number, since it uses less digits than its factorization.

665056242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 206598 (or 206595 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 36.

The square root of 665056242 is about 25788.6843790062. The cubic root of 665056242 is about 872.8764798099.

The spelling of 665056242 in words is "six hundred sixty-five million, fifty-six thousand, two hundred forty-two".