666668334 has 16 divisors (see below), whose sum is σ = 1333941840. Its totient is φ = 222121920.

The previous prime is 666668309. The next prime is 666668347. The reversal of 666668334 is 433866666.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10207 + ... + 37914.

It is an arithmetic number, because the mean of its divisors is an integer number (83371365).

Almost surely, 2^666668334 is an apocalyptic number.

666668334 is an abundant number, since it is smaller than the sum of its proper divisors (667273506).

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

666668334 is a wasteful number, since it uses less digits than its factorization.

666668334 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50435.

The product of its digits is 2239488, while the sum is 48.

The square root of 666668334 is about 25819.9212624671. The cubic root of 666668334 is about 873.5811930106.

It can be divided in two parts, 6 and 66668334, that multiplied together give a palindrome (400010004).

The spelling of 666668334 in words is "six hundred sixty-six million, six hundred sixty-eight thousand, three hundred thirty-four".