165665822 has 8 divisors (see below), whose sum is σ = 283998576. Its totient is φ = 70999632.

The previous prime is 165665779. The next prime is 165665879. The reversal of 165665822 is 228566561.

165665822 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is a self number, because there is not a number n which added to its sum of digits gives 165665822.

It is a congruent 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, 5916623 + ... + 5916650.

It is an arithmetic number, because the mean of its divisors is an integer number (35499822).

Almost surely, 2^165665822 is an apocalyptic number.

165665822 is a deficient number, since it is larger than the sum of its proper divisors (118332754).

165665822 is a wasteful number, since it uses less digits than its factorization.

165665822 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11833282.

The product of its digits is 172800, while the sum is 41.

The square root of 165665822 is about 12871.1235717788. The cubic root of 165665822 is about 549.2174236659.

The spelling of 165665822 in words is "one hundred sixty-five million, six hundred sixty-five thousand, eight hundred twenty-two".