666668518335 has 48 divisors (see below), whose sum is σ = 1201978377600. Its totient is φ = 354482140320.

The previous prime is 666668518303. The next prime is 666668518337. The reversal of 666668518335 is 533815866666.

It is not a de Polignac number, because 666668518335 - 2⁵ = 666668518303 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (666668518337) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 426685 + ... + 1231014.

It is an arithmetic number, because the mean of its divisors is an integer number (25041216200).

Almost surely, 2^666668518335 is an apocalyptic number.

666668518335 is a deficient number, since it is larger than the sum of its proper divisors (535309859265).

666668518335 is a wasteful number, since it uses less digits than its factorization.

666668518335 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1658050 (or 1658038 counting only the distinct ones).

The product of its digits is 111974400, while the sum is 63.

The spelling of 666668518335 in words is "six hundred sixty-six billion, six hundred sixty-eight million, five hundred eighteen thousand, three hundred thirty-five".