1665165166 has 8 divisors (see below), whose sum is σ = 2854568880. Its totient is φ = 713642208.

The previous prime is 1665165163. The next prime is 1665165197. The reversal of 1665165166 is 6615615661.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1665165163) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 59470171 + ... + 59470198.

It is an arithmetic number, because the mean of its divisors is an integer number (356821110).

Almost surely, 2^1665165166 is an apocalyptic number.

1665165166 is a deficient number, since it is larger than the sum of its proper divisors (1189403714).

1665165166 is a wasteful number, since it uses less digits than its factorization.

1665165166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118940378.

The product of its digits is 194400, while the sum is 43.

The square root of 1665165166 is about 40806.4353503219. The cubic root of 1665165166 is about 1185.2749493449.

The spelling of 1665165166 in words is "one billion, six hundred sixty-five million, one hundred sixty-five thousand, one hundred sixty-six".