186666686667 has 6 divisors (see below), whose sum is σ = 269629658532. Its totient is φ = 124444457772.

The previous prime is 186666686639. The next prime is 186666686681. The reversal of 186666686667 is 766686666681.

It is not a de Polignac number, because 186666686667 - 2²⁰ = 186665638091 is a prime.

It is a super-2 number, since 2×186666686667² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 186666686595 and 186666686604.

It is not an unprimeable number, because it can be changed into a prime (186666686567) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 10370371473 + ... + 10370371490.

It is an arithmetic number, because the mean of its divisors is an integer number (44938276422).

Almost surely, 2^186666686667 is an apocalyptic number.

186666686667 is a deficient number, since it is larger than the sum of its proper divisors (82962971865).

186666686667 is a wasteful number, since it uses less digits than its factorization.

186666686667 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20740742969 (or 20740742966 counting only the distinct ones).

The product of its digits is 752467968, while the sum is 72.

The spelling of 186666686667 in words is "one hundred eighty-six billion, six hundred sixty-six million, six hundred eighty-six thousand, six hundred sixty-seven".