165662825 has 6 divisors (see below), whose sum is σ = 205421934. Its totient is φ = 132530240.

The previous prime is 165662821. The next prime is 165662839. The reversal of 165662825 is 528266561.

It can be written as a sum of positive squares in 3 ways, for example, as 3125824 + 162537001 = 1768^2 + 12749^2 .

It is not a de Polignac number, because 165662825 - 2² = 165662821 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (165662821) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3313232 + ... + 3313281.

It is an arithmetic number, because the mean of its divisors is an integer number (34236989).

Almost surely, 2^165662825 is an apocalyptic number.

It is an amenable number.

165662825 is a deficient number, since it is larger than the sum of its proper divisors (39759109).

165662825 is an equidigital number, since it uses as much as digits as its factorization.

165662825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6626523 (or 6626518 counting only the distinct ones).

The product of its digits is 172800, while the sum is 41.

The square root of 165662825 is about 12871.0071478498. The cubic root of 165662825 is about 549.2141117486.

It can be divided in two parts, 16566 and 2825, that added together give a palindrome (19391).

The spelling of 165662825 in words is "one hundred sixty-five million, six hundred sixty-two thousand, eight hundred twenty-five".