165055505666 has 8 divisors (see below), whose sum is σ = 248087502864. Its totient is φ = 82359671380.

The previous prime is 165055505653. The next prime is 165055505687. The reversal of 165055505666 is 666505550561.

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

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, 84039500 + ... + 84041463.

It is an arithmetic number, because the mean of its divisors is an integer number (31010937858).

Almost surely, 2^165055505666 is an apocalyptic number.

165055505666 is a deficient number, since it is larger than the sum of its proper divisors (83031997198).

165055505666 is a wasteful number, since it uses less digits than its factorization.

165055505666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 168081456.

The product of its (nonzero) digits is 4050000, while the sum is 50.

The spelling of 165055505666 in words is "one hundred sixty-five billion, fifty-five million, five hundred five thousand, six hundred sixty-six".