165762161 has 4 divisors (see below), whose sum is σ = 165850992. Its totient is φ = 165673332.

The previous prime is 165762151. The next prime is 165762167. The reversal of 165762161 is 161267561.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 165762161 - 2⁶ = 165762097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (165762167) 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 3 ways as a sum of consecutive naturals, for example, 41555 + ... + 45368.

It is an arithmetic number, because the mean of its divisors is an integer number (41462748).

Almost surely, 2^165762161 is an apocalyptic number.

It is an amenable number.

165762161 is a deficient number, since it is larger than the sum of its proper divisors (88831).

165762161 is an equidigital number, since it uses as much as digits as its factorization.

165762161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88830.

The product of its digits is 15120, while the sum is 35.

The square root of 165762161 is about 12874.8654750254. The cubic root of 165762161 is about 549.3238644587.

The spelling of 165762161 in words is "one hundred sixty-five million, seven hundred sixty-two thousand, one hundred sixty-one".