165784965 has 8 divisors (see below), whose sum is σ = 265255968. Its totient is φ = 88418640.

The previous prime is 165784961. The next prime is 165784981. The reversal of 165784965 is 569487561.

165784965 is digitally balanced in base 2, 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 not a de Polignac number, because 165784965 - 2² = 165784961 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165784961) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5526151 + ... + 5526180.

It is an arithmetic number, because the mean of its divisors is an integer number (33156996).

Almost surely, 2^165784965 is an apocalyptic number.

165784965 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

165784965 is a deficient number, since it is larger than the sum of its proper divisors (99471003).

165784965 is a wasteful number, since it uses less digits than its factorization.

165784965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11052339.

The product of its digits is 1814400, while the sum is 51.

The square root of 165784965 is about 12875.7510460555. The cubic root of 165784965 is about 549.3490535749.

The spelling of 165784965 in words is "one hundred sixty-five million, seven hundred eighty-four thousand, nine hundred sixty-five".