191666676676 has 12 divisors (see below), whose sum is σ = 335419982380. Its totient is φ = 95832396000.

The previous prime is 191666676673. The next prime is 191666676709. The reversal of 191666676676 is 676676666191.

It can be written as a sum of positive squares in 2 ways, for example, as 13773369600 + 177893307076 = 117360^2 + 421774^2 .

It is a super-2 number, since 2×191666676676² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (191666676673) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 432670 + ... + 755338.

Almost surely, 2^191666676676 is an apocalyptic number.

It is an amenable number.

191666676676 is a deficient number, since it is larger than the sum of its proper divisors (143753305704).

191666676676 is a wasteful number, since it uses less digits than its factorization.

191666676676 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 471174 (or 471172 counting only the distinct ones).

The product of its digits is 123451776, while the sum is 67.

The spelling of 191666676676 in words is "one hundred ninety-one billion, six hundred sixty-six million, six hundred seventy-six thousand, six hundred seventy-six".