1165550655666 has 8 divisors (see below), whose sum is σ = 2331101311344. Its totient is φ = 388516885220.

The previous prime is 1165550655587. The next prime is 1165550655667. The reversal of 1165550655666 is 6665560555611.

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

1165550655666 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (1165550655667) 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 3 ways as a sum of consecutive naturals, for example, 97129221300 + ... + 97129221311.

It is an arithmetic number, because the mean of its divisors is an integer number (291387663918).

Almost surely, 2^{1165550655666} is an apocalyptic number.

1165550655666 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1165550655666 is a wasteful number, since it uses less digits than its factorization.

1165550655666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 194258442616.

The product of its (nonzero) digits is 24300000, while the sum is 57.

The spelling of 1165550655666 in words is "one trillion, one hundred sixty-five billion, five hundred fifty million, six hundred fifty-five thousand, six hundred sixty-six".