666733666734 has 12 divisors (see below), whose sum is σ = 1444589611296. Its totient is φ = 222244555572.

The previous prime is 666733666681. The next prime is 666733666741. The reversal of 666733666734 is 437666337666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 18520379614 + ... + 18520379649.

It is an arithmetic number, because the mean of its divisors is an integer number (120382467608).

Almost surely, 2^666733666734 is an apocalyptic number.

666733666734 is an abundant number, since it is smaller than the sum of its proper divisors (777855944562).

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

666733666734 is a wasteful number, since it uses less digits than its factorization.

666733666734 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37040759271 (or 37040759268 counting only the distinct ones).

The product of its digits is 246903552, while the sum is 63.

The spelling of 666733666734 in words is "six hundred sixty-six billion, seven hundred thirty-three million, six hundred sixty-six thousand, seven hundred thirty-four".