1155165666 has 8 divisors (see below), whose sum is σ = 2310331344. Its totient is φ = 385055220.

The previous prime is 1155165653. The next prime is 1155165677. The reversal of 1155165666 is 6665615511.

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

1155165666 is an admirable number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 96263800 + ... + 96263811.

It is an arithmetic number, because the mean of its divisors is an integer number (288791418).

Almost surely, 2^1155165666 is an apocalyptic number.

1155165666 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.

1155165666 is a wasteful number, since it uses less digits than its factorization.

1155165666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 192527616.

The product of its digits is 162000, while the sum is 42.

The square root of 1155165666 is about 33987.7281676784. The cubic root of 1155165666 is about 1049.2559100081.

The spelling of 1155165666 in words is "one billion, one hundred fifty-five million, one hundred sixty-five thousand, six hundred sixty-six".