11661165010998 has 48 divisors (see below), whose sum is σ = 26164211089536. Its totient is φ = 3749647973760.

The previous prime is 11661165010991. The next prime is 11661165011033. The reversal of 11661165010998 is 89901056116611.

11661165010998 is a `hidden beast` number, since 1 + 1 + 6 + 611 + 6 + 5 + 0 + 10 + 9 + 9 + 8 = 666.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11661165010991) 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 23 ways as a sum of consecutive naturals, for example, 33208965 + ... + 33558272.

It is an arithmetic number, because the mean of its divisors is an integer number (545087731032).

Almost surely, 2^{11661165010998} is an apocalyptic number.

11661165010998 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

11661165010998 is an abundant number, since it is smaller than the sum of its proper divisors (14503046078538).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11661165010998 is a wasteful number, since it uses less digits than its factorization.

11661165010998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66767589 (or 66767586 counting only the distinct ones).

The product of its (nonzero) digits is 699840, while the sum is 54.

The spelling of 11661165010998 in words is "eleven trillion, six hundred sixty-one billion, one hundred sixty-five million, ten thousand, nine hundred ninety-eight".