111660663789770 has 16 divisors (see below), whose sum is σ = 201003641215560. Its totient is φ = 44661055206144.

The previous prime is 111660663789769. The next prime is 111660663789793. The reversal of 111660663789770 is 77987366066111.

It can be written as a sum of positive squares in 4 ways, for example, as 97462169077849 + 14198494711921 = 9872293^2 + 3768089^2 .

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 111660663789770.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 401142635 + ... + 401420894.

Almost surely, 2^{111660663789770} is an apocalyptic number.

111660663789770 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

111660663789770 is a deficient number, since it is larger than the sum of its proper divisors (89342977425790).

111660663789770 is a wasteful number, since it uses less digits than its factorization.

111660663789770 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 802577449.

The product of its (nonzero) digits is 96018048, while the sum is 68.

The spelling of 111660663789770 in words is "one hundred eleven trillion, six hundred sixty billion, six hundred sixty-three million, seven hundred eighty-nine thousand, seven hundred seventy".