165066656605 has 8 divisors (see below), whose sum is σ = 198085536000. Its totient is φ = 132049626576.

The previous prime is 165066656563. The next prime is 165066656663. The reversal of 165066656605 is 506656660561.

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

It is a cyclic number.

It is not a de Polignac number, because 165066656605 - 2⁷ = 165066656477 is a prime.

It is a super-2 number, since 2×165066656605² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 257745 + ... + 629734.

It is an arithmetic number, because the mean of its divisors is an integer number (24760692000).

Almost surely, 2^165066656605 is an apocalyptic number.

It is an amenable number.

165066656605 is a deficient number, since it is larger than the sum of its proper divisors (33018879395).

165066656605 is an equidigital number, since it uses as much as digits as its factorization.

165066656605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 924683.

The product of its (nonzero) digits is 5832000, while the sum is 52.

The spelling of 165066656605 in words is "one hundred sixty-five billion, sixty-six million, six hundred fifty-six thousand, six hundred five".