666016543335250 has 128 divisors (see below), whose sum is σ = 1301325608943360. Its totient is φ = 255011492736000.

The previous prime is 666016543335229. The next prime is 666016543335263. The reversal of 666016543335250 is 52533345610666.

It is a junction number, because it is equal to n+sod(n) for n = 666016543335191 and 666016543335200.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 501286321 + ... + 502613179.

It is an arithmetic number, because the mean of its divisors is an integer number (10166606319870).

Almost surely, 2^{666016543335250} is an apocalyptic number.

666016543335250 is a deficient number, since it is larger than the sum of its proper divisors (635309065608110).

666016543335250 is a wasteful number, since it uses less digits than its factorization.

666016543335250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1327853 (or 1327843 counting only the distinct ones).

The product of its (nonzero) digits is 34992000, while the sum is 55.

The spelling of 666016543335250 in words is "six hundred sixty-six trillion, sixteen billion, five hundred forty-three million, three hundred thirty-five thousand, two hundred fifty".