166683366687 has 16 divisors (see below), whose sum is σ = 233962364160. Its totient is φ = 105264346752.

The previous prime is 166683366679. The next prime is 166683366701. The reversal of 166683366687 is 786663386661.

It is not a de Polignac number, because 166683366687 - 2³ = 166683366679 is a prime.

It is a super-2 number, since 2×166683366687² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166683366617) 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, 547543 + ... + 795719.

It is an arithmetic number, because the mean of its divisors is an integer number (14622647760).

Almost surely, 2^166683366687 is an apocalyptic number.

166683366687 is a deficient number, since it is larger than the sum of its proper divisors (67278997473).

166683366687 is a wasteful number, since it uses less digits than its factorization.

166683366687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 259982.

The product of its digits is 188116992, while the sum is 66.

The spelling of 166683366687 in words is "one hundred sixty-six billion, six hundred eighty-three million, three hundred sixty-six thousand, six hundred eighty-seven".