165330625 has 10 divisors (see below), whose sum is σ = 206597930. Its totient is φ = 132264000.

The previous prime is 165330623. The next prime is 165330643. The reversal of 165330625 is 526033561.

It can be written as a sum of positive squares in 5 ways, for example, as 122611329 + 42719296 = 11073^2 + 6536^2 .

It is not a de Polignac number, because 165330625 - 2¹ = 165330623 is a prime.

It is not an unprimeable number, because it can be changed into a prime (165330623) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 131640 + ... + 132889.

It is an arithmetic number, because the mean of its divisors is an integer number (20659793).

Almost surely, 2^165330625 is an apocalyptic number.

It is an amenable number.

165330625 is a deficient number, since it is larger than the sum of its proper divisors (41267305).

165330625 is an frugal number, since it uses more digits than its factorization.

165330625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 264549 (or 264534 counting only the distinct ones).

The product of its (nonzero) digits is 16200, while the sum is 31.

The square root of 165330625 is about 12858.0956988195. The cubic root of 165330625 is about 548.8467571181.

The spelling of 165330625 in words is "one hundred sixty-five million, three hundred thirty thousand, six hundred twenty-five".