165345566 has 8 divisors (see below), whose sum is σ = 248073840. Its totient is φ = 82654288.

The previous prime is 165345541. The next prime is 165345569. The reversal of 165345566 is 665543561.

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

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165345569) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 9650 + ... + 20586.

It is an arithmetic number, because the mean of its divisors is an integer number (31009230).

Almost surely, 2^165345566 is an apocalyptic number.

165345566 is a deficient number, since it is larger than the sum of its proper divisors (82728274).

165345566 is a wasteful number, since it uses less digits than its factorization.

165345566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18498.

The product of its digits is 324000, while the sum is 41.

The square root of 165345566 is about 12858.6766815252. The cubic root of 165345566 is about 548.8632897929.

The spelling of 165345566 in words is "one hundred sixty-five million, three hundred forty-five thousand, five hundred sixty-six".