666034721623268 has 12 divisors (see below), whose sum is σ = 1165624105220652. Its totient is φ = 332999262988800.

The previous prime is 666034721623247. The next prime is 666034721623351. The reversal of 666034721623268 is 862326127430666.

It can be written as a sum of positive squares in 2 ways, for example, as 393027770205184 + 273006951418084 = 19824928^2 + 16522922^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 666034721623268.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4524372905 + ... + 4524520112.

It is an arithmetic number, because the mean of its divisors is an integer number (97135342101721).

Almost surely, 2^{666034721623268} is an apocalyptic number.

It is an amenable number.

666034721623268 is a deficient number, since it is larger than the sum of its proper divisors (499589383597384).

666034721623268 is a wasteful number, since it uses less digits than its factorization.

666034721623268 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9048911422 (or 9048911420 counting only the distinct ones).

The product of its (nonzero) digits is 125411328, while the sum is 62.

The spelling of 666034721623268 in words is "six hundred sixty-six trillion, thirty-four billion, seven hundred twenty-one million, six hundred twenty-three thousand, two hundred sixty-eight".