1976666491827 has 12 divisors (see below), whose sum is σ = 2857396556664. Its totient is φ = 1316756911680.

The previous prime is 1976666491801. The next prime is 1976666491831. The reversal of 1976666491827 is 7281946666791.

It is a happy number.

It is not a de Polignac number, because 1976666491827 - 2⁸ = 1976666491571 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1976666491847) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 85050198 + ... + 85073435.

It is an arithmetic number, because the mean of its divisors is an integer number (238116379722).

Almost surely, 2^{1976666491827} is an apocalyptic number.

1976666491827 is a deficient number, since it is larger than the sum of its proper divisors (880730064837).

1976666491827 is a wasteful number, since it uses less digits than its factorization.

1976666491827 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170124930 (or 170124927 counting only the distinct ones).

The product of its digits is 329204736, while the sum is 72.

The spelling of 1976666491827 in words is "one trillion, nine hundred seventy-six billion, six hundred sixty-six million, four hundred ninety-one thousand, eight hundred twenty-seven".