660868185071 has 4 divisors (see below), whose sum is σ = 661045507872. Its totient is φ = 660690862272.

The previous prime is 660868185041. The next prime is 660868185113. The reversal of 660868185071 is 170581868066.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 660868185071 - 2¹⁴ = 660868168687 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 660868184998 and 660868185016.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (660868185041) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 88655810 + ... + 88663263.

It is an arithmetic number, because the mean of its divisors is an integer number (165261376968).

Almost surely, 2^660868185071 is an apocalyptic number.

660868185071 is a deficient number, since it is larger than the sum of its proper divisors (177322801).

660868185071 is a wasteful number, since it uses less digits than its factorization.

660868185071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 177322800.

The product of its (nonzero) digits is 3870720, while the sum is 56.

The spelling of 660868185071 in words is "six hundred sixty billion, eight hundred sixty-eight million, one hundred eighty-five thousand, seventy-one".