165752990 has 32 divisors (see below), whose sum is σ = 323791776. Its totient is φ = 60727680.

The previous prime is 165752987. The next prime is 165752999. The reversal of 165752990 is 99257561.

It is a happy number.

165752990 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165752999) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12164 + ... + 21896.

It is an arithmetic number, because the mean of its divisors is an integer number (10118493).

Almost surely, 2^165752990 is an apocalyptic number.

165752990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

165752990 is a deficient number, since it is larger than the sum of its proper divisors (158038786).

165752990 is a wasteful number, since it uses less digits than its factorization.

165752990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9884.

The product of its (nonzero) digits is 170100, while the sum is 44.

The square root of 165752990 is about 12874.5093110378. The cubic root of 165752990 is about 549.3137335940.

The spelling of 165752990 in words is "one hundred sixty-five million, seven hundred fifty-two thousand, nine hundred ninety".