1166125654205 has 8 divisors (see below), whose sum is σ = 1400330045400. Its totient is φ = 932247683136.

The previous prime is 1166125654171. The next prime is 1166125654229. The reversal of 1166125654205 is 5024565216611.

It can be written as a sum of positive squares in 4 ways, for example, as 149412398521 + 1016713255684 = 386539^2 + 1008322^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1166125654205 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 81597170 + ... + 81611459.

It is an arithmetic number, because the mean of its divisors is an integer number (175041255675).

Almost surely, 2^{1166125654205} is an apocalyptic number.

It is an amenable number.

1166125654205 is a deficient number, since it is larger than the sum of its proper divisors (234204391195).

1166125654205 is a wasteful number, since it uses less digits than its factorization.

1166125654205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163210063.

The product of its (nonzero) digits is 432000, while the sum is 44.

The spelling of 1166125654205 in words is "one trillion, one hundred sixty-six billion, one hundred twenty-five million, six hundred fifty-four thousand, two hundred five".