168520166687 has 8 divisors (see below), whose sum is σ = 175864714080. Its totient is φ = 161177084640.

The previous prime is 168520166651. The next prime is 168520166707. The reversal of 168520166687 is 786661025861.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 168520166687 - 2¹⁴ = 168520150303 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 (168520166627) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 128012 + ... + 594497.

It is an arithmetic number, because the mean of its divisors is an integer number (21983089260).

Almost surely, 2^168520166687 is an apocalyptic number.

168520166687 is a deficient number, since it is larger than the sum of its proper divisors (7344547393).

168520166687 is a wasteful number, since it uses less digits than its factorization.

168520166687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 732673.

The product of its (nonzero) digits is 5806080, while the sum is 56.

The spelling of 168520166687 in words is "one hundred sixty-eight billion, five hundred twenty million, one hundred sixty-six thousand, six hundred eighty-seven".