667886242 has 16 divisors (see below), whose sum is σ = 1067887800. Its totient is φ = 312187648.

The previous prime is 667886207. The next prime is 667886249. The reversal of 667886242 is 242688766.

667886242 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 407999601 + 259886641 = 20199^2 + 16121^2 .

It is not an unprimeable number, because it can be changed into a prime (667886249) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 60853 + ... + 70984.

Almost surely, 2^667886242 is an apocalyptic number.

667886242 is a deficient number, since it is larger than the sum of its proper divisors (400001558).

667886242 is a wasteful number, since it uses less digits than its factorization.

667886242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132005.

The product of its digits is 1548288, while the sum is 49.

The square root of 667886242 is about 25843.4951583566. The cubic root of 667886242 is about 874.1128388262.

The spelling of 667886242 in words is "six hundred sixty-seven million, eight hundred eighty-six thousand, two hundred forty-two".