165750355 has 4 divisors (see below), whose sum is σ = 198900432. Its totient is φ = 132600280.

The previous prime is 165750317. The next prime is 165750371. The reversal of 165750355 is 553057561.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 165750355 - 2²³ = 157361747 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 16575031 + ... + 16575040.

It is an arithmetic number, because the mean of its divisors is an integer number (49725108).

Almost surely, 2^165750355 is an apocalyptic number.

165750355 is a deficient number, since it is larger than the sum of its proper divisors (33150077).

165750355 is an equidigital number, since it uses as much as digits as its factorization.

165750355 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33150076.

The product of its (nonzero) digits is 78750, while the sum is 37.

The square root of 165750355 is about 12874.4069766339. The cubic root of 165750355 is about 549.3108227378.

The spelling of 165750355 in words is "one hundred sixty-five million, seven hundred fifty thousand, three hundred fifty-five".