1166105655505 has 32 divisors (see below), whose sum is σ = 1654731555840. Its totient is φ = 771876672000.

The previous prime is 1166105655467. The next prime is 1166105655571. The reversal of 1166105655505 is 5055565016611.

It is a happy number.

It is not a de Polignac number, because 1166105655505 - 2¹³ = 1166105647313 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4701357 + ... + 4943173.

It is an arithmetic number, because the mean of its divisors is an integer number (51710361120).

Almost surely, 2^{1166105655505} is an apocalyptic number.

It is an amenable number.

1166105655505 is a deficient number, since it is larger than the sum of its proper divisors (488625900335).

1166105655505 is a wasteful number, since it uses less digits than its factorization.

1166105655505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 246609.

The product of its (nonzero) digits is 675000, while the sum is 46.

The spelling of 1166105655505 in words is "one trillion, one hundred sixty-six billion, one hundred five million, six hundred fifty-five thousand, five hundred five".