1166663191799 has 8 divisors (see below), whose sum is σ = 1333416522240. Its totient is φ = 999931651416.

The previous prime is 1166663191711. The next prime is 1166663191849. The reversal of 1166663191799 is 9971913666611.

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

It is a cyclic number.

It is not a de Polignac number, because 1166663191799 - 2²⁸ = 1166394756343 is a prime.

It is a super-2 number, since 2×1166663191799² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1166663191709) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5332619 + ... + 5547084.

It is an arithmetic number, because the mean of its divisors is an integer number (166677065280).

Almost surely, 2^{1166663191799} is an apocalyptic number.

1166663191799 is a deficient number, since it is larger than the sum of its proper divisors (166753330441).

1166663191799 is a wasteful number, since it uses less digits than its factorization.

1166663191799 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10895029.

The product of its digits is 19840464, while the sum is 65.

The spelling of 1166663191799 in words is "one trillion, one hundred sixty-six billion, six hundred sixty-three million, one hundred ninety-one thousand, seven hundred ninety-nine".