165650020 has 24 divisors (see below), whose sum is σ = 350175168. Its totient is φ = 65820000.

The previous prime is 165649987. The next prime is 165650027. The reversal of 165650020 is 20056561.

It is not an unprimeable number, because it can be changed into a prime (165650027) 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 7 ways as a sum of consecutive naturals, for example, 24406 + ... + 30445.

It is an arithmetic number, because the mean of its divisors is an integer number (14590632).

Almost surely, 2^165650020 is an apocalyptic number.

165650020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

165650020 is an abundant number, since it is smaller than the sum of its proper divisors (184525148).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

165650020 is a wasteful number, since it uses less digits than its factorization.

165650020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55011 (or 55009 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 25.

The square root of 165650020 is about 12870.5097024166. The cubic root of 165650020 is about 549.1999607808.

The spelling of 165650020 in words is "one hundred sixty-five million, six hundred fifty thousand, twenty".