666838334 has 16 divisors (see below), whose sum is σ = 1043177856. Its totient is φ = 319334400.

The previous prime is 666838331. The next prime is 666838343. The reversal of 666838334 is 433838666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (666838331) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 49427 + ... + 61454.

It is an arithmetic number, because the mean of its divisors is an integer number (65198616).

Almost surely, 2^666838334 is an apocalyptic number.

666838334 is a deficient number, since it is larger than the sum of its proper divisors (376339522).

666838334 is a wasteful number, since it uses less digits than its factorization.

666838334 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111011.

The product of its digits is 1492992, while the sum is 47.

The square root of 666838334 is about 25823.2130843549. The cubic root of 666838334 is about 873.6554409156.

The spelling of 666838334 in words is "six hundred sixty-six million, eight hundred thirty-eight thousand, three hundred thirty-four".