168666687 has 24 divisors (see below), whose sum is σ = 278853120. Its totient is φ = 96235920.

The previous prime is 168666679. The next prime is 168666703. The reversal of 168666687 is 786666861.

It is not a de Polignac number, because 168666687 - 2³ = 168666679 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (168616687) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 51262 + ... + 54452.

It is an arithmetic number, because the mean of its divisors is an integer number (11618880).

Almost surely, 2^168666687 is an apocalyptic number.

168666687 is a deficient number, since it is larger than the sum of its proper divisors (110186433).

168666687 is a wasteful number, since it uses less digits than its factorization.

168666687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4043 (or 4040 counting only the distinct ones).

The product of its digits is 3483648, while the sum is 54.

The square root of 168666687 is about 12987.1739420091. The cubic root of 168666687 is about 552.5137682802.

The spelling of 168666687 in words is "one hundred sixty-eight million, six hundred sixty-six thousand, six hundred eighty-seven".