127866669666 has 8 divisors (see below), whose sum is σ = 255733339344. Its totient is φ = 42622223220.

The previous prime is 127866669653. The next prime is 127866669673. The reversal of 127866669666 is 666966668721.

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

127866669666 is an admirable number.

It is a super-2 number, since 2×127866669666² (a number of 23 digits) contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 127866669666.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10655555800 + ... + 10655555811.

It is an arithmetic number, because the mean of its divisors is an integer number (31966667418).

Almost surely, 2^127866669666 is an apocalyptic number.

127866669666 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

127866669666 is a wasteful number, since it uses less digits than its factorization.

127866669666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21311111616.

The product of its digits is 282175488, while the sum is 69.

The spelling of 127866669666 in words is "one hundred twenty-seven billion, eight hundred sixty-six million, six hundred sixty-nine thousand, six hundred sixty-six".