165960001 has 4 divisors (see below), whose sum is σ = 175722372. Its totient is φ = 156197632.

The previous prime is 165959993. The next prime is 165960017. The reversal of 165960001 is 100069561.

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

It can be written as a sum of positive squares in 2 ways, for example, as 93624976 + 72335025 = 9676^2 + 8505^2 .

It is not a de Polignac number, because 165960001 - 2³ = 165959993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (165960061) 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, 4881160 + ... + 4881193.

It is an arithmetic number, because the mean of its divisors is an integer number (43930593).

Almost surely, 2^165960001 is an apocalyptic number.

It is an amenable number.

165960001 is a deficient number, since it is larger than the sum of its proper divisors (9762371).

165960001 is an equidigital number, since it uses as much as digits as its factorization.

165960001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9762370.

The product of its (nonzero) digits is 1620, while the sum is 28.

The square root of 165960001 is about 12882.5463709625. The cubic root of 165960001 is about 549.5423200759.

The spelling of 165960001 in words is "one hundred sixty-five million, nine hundred sixty thousand, one".