1166663191798 has 8 divisors (see below), whose sum is σ = 1884609771408. Its totient is φ = 538459934664.

The previous prime is 1166663191711. The next prime is 1166663191849. The reversal of 1166663191798 is 8971913666611.

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

It is a super-2 number, since 2×1166663191798² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

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, 22435830586 + ... + 22435830637.

It is an arithmetic number, because the mean of its divisors is an integer number (235576221426).

Almost surely, 2^{1166663191798} is an apocalyptic number.

1166663191798 is a deficient number, since it is larger than the sum of its proper divisors (717946579610).

1166663191798 is a wasteful number, since it uses less digits than its factorization.

1166663191798 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44871661238.

The product of its digits is 17635968, while the sum is 64.

The spelling of 1166663191798 in words is "one trillion, one hundred sixty-six billion, six hundred sixty-three million, one hundred ninety-one thousand, seven hundred ninety-eight".