186668686871 has 8 divisors (see below), whose sum is σ = 188652747600. Its totient is φ = 184694376448.

The previous prime is 186668686861. The next prime is 186668686877. The reversal of 186668686871 is 178686866681.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-186668686871 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 186668686795 and 186668686804.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (186668686877) 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, 2399081 + ... + 2475666.

It is an arithmetic number, because the mean of its divisors is an integer number (23581593450).

Almost surely, 2^186668686871 is an apocalyptic number.

186668686871 is a deficient number, since it is larger than the sum of its proper divisors (1984060729).

186668686871 is a wasteful number, since it uses less digits than its factorization.

186668686871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4875153.

The product of its digits is 222953472, while the sum is 71.

The spelling of 186668686871 in words is "one hundred eighty-six billion, six hundred sixty-eight million, six hundred eighty-six thousand, eight hundred seventy-one".