667705582117 has 12 divisors (see below), whose sum is σ = 776763101196. Its totient is φ = 572286382080.

The previous prime is 667705582087. The next prime is 667705582127. The reversal of 667705582117 is 711285507766.

667705582117 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 34727813316 + 632977768801 = 186354^2 + 795599^2 .

It is a de Polignac number, because none of the positive numbers 2^k-667705582117 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667705582127) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 497943 + ... + 1258315.

It is an arithmetic number, because the mean of its divisors is an integer number (64730258433).

Almost surely, 2^667705582117 is an apocalyptic number.

It is an amenable number.

667705582117 is a deficient number, since it is larger than the sum of its proper divisors (109057519079).

667705582117 is a wasteful number, since it uses less digits than its factorization.

667705582117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 778308 (or 778301 counting only the distinct ones).

The product of its (nonzero) digits is 4939200, while the sum is 55.

The spelling of 667705582117 in words is "six hundred sixty-seven billion, seven hundred five million, five hundred eighty-two thousand, one hundred seventeen".