666850018345 has 16 divisors (see below), whose sum is σ = 919589868288. Its totient is φ = 454742233920.

The previous prime is 666850018343. The next prime is 666850018397. The reversal of 666850018345 is 543810058666.

It is not a de Polignac number, because 666850018345 - 2¹ = 666850018343 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 666850018292 and 666850018301.

It is not an unprimeable number, because it can be changed into a prime (666850018343) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 52625869 + ... + 52638538.

It is an arithmetic number, because the mean of its divisors is an integer number (57474366768).

Almost surely, 2^666850018345 is an apocalyptic number.

It is an amenable number.

666850018345 is a deficient number, since it is larger than the sum of its proper divisors (252739849943).

666850018345 is a wasteful number, since it uses less digits than its factorization.

666850018345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105264600.

The product of its (nonzero) digits is 4147200, while the sum is 52.

The spelling of 666850018345 in words is "six hundred sixty-six billion, eight hundred fifty million, eighteen thousand, three hundred forty-five".