165947763 has 4 divisors (see below), whose sum is σ = 221263688. Its totient is φ = 110631840.

The previous prime is 165947759. The next prime is 165947779. The reversal of 165947763 is 367749561.

It is a happy number.

165947763 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 367749561 = 3 ⋅122583187.

It is not a de Polignac number, because 165947763 - 2² = 165947759 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (165947753) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27657958 + ... + 27657963.

It is an arithmetic number, because the mean of its divisors is an integer number (55315922).

Almost surely, 2^165947763 is an apocalyptic number.

165947763 is a deficient number, since it is larger than the sum of its proper divisors (55315925).

165947763 is an equidigital number, since it uses as much as digits as its factorization.

165947763 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55315924.

The product of its digits is 952560, while the sum is 48.

The square root of 165947763 is about 12882.0713784702. The cubic root of 165947763 is about 549.5288118727.

The spelling of 165947763 in words is "one hundred sixty-five million, nine hundred forty-seven thousand, seven hundred sixty-three".