660849745171 has 16 divisors (see below), whose sum is σ = 823988724480. Its totient is φ = 514902754080.

The previous prime is 660849745141. The next prime is 660849745177. The reversal of 660849745171 is 171547948066.

It is not a de Polignac number, because 660849745171 - 2¹¹ = 660849743123 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (660849745177) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 522940 + ... + 1262998.

It is an arithmetic number, because the mean of its divisors is an integer number (51499295280).

Almost surely, 2^660849745171 is an apocalyptic number.

660849745171 is a deficient number, since it is larger than the sum of its proper divisors (163138979309).

660849745171 is a wasteful number, since it uses less digits than its factorization.

660849745171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 751674.

The product of its (nonzero) digits is 10160640, while the sum is 58.

The spelling of 660849745171 in words is "six hundred sixty billion, eight hundred forty-nine million, seven hundred forty-five thousand, one hundred seventy-one".