666746470244 has 24 divisors (see below), whose sum is σ = 1194466257600. Its totient is φ = 325549032480.

The previous prime is 666746470213. The next prime is 666746470259. The reversal of 666746470244 is 442074647666.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 666746470244.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9795464 + ... + 9863295.

It is an arithmetic number, because the mean of its divisors is an integer number (49769427400).

Almost surely, 2^666746470244 is an apocalyptic number.

It is an amenable number.

666746470244 is a deficient number, since it is larger than the sum of its proper divisors (527719787356).

666746470244 is a wasteful number, since it uses less digits than its factorization.

666746470244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19658963 (or 19658961 counting only the distinct ones).

The product of its (nonzero) digits is 32514048, while the sum is 56.

The spelling of 666746470244 in words is "six hundred sixty-six billion, seven hundred forty-six million, four hundred seventy thousand, two hundred forty-four".