166242325 has 6 divisors (see below), whose sum is σ = 206140514. Its totient is φ = 132993840.

The previous prime is 166242319. The next prime is 166242341. The reversal of 166242325 is 523242661.

It can be written as a sum of positive squares in 3 ways, for example, as 42432196 + 123810129 = 6514^2 + 11127^2 .

It is not a de Polignac number, because 166242325 - 2³ = 166242317 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3324822 + ... + 3324871.

Almost surely, 2^166242325 is an apocalyptic number.

It is an amenable number.

166242325 is a deficient number, since it is larger than the sum of its proper divisors (39898189).

166242325 is an equidigital number, since it uses as much as digits as its factorization.

166242325 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6649703 (or 6649698 counting only the distinct ones).

The product of its digits is 17280, while the sum is 31.

The square root of 166242325 is about 12893.4993310583. The cubic root of 166242325 is about 549.8537627739.

Adding to 166242325 its reverse (523242661), we get a palindrome (689484986).

The spelling of 166242325 in words is "one hundred sixty-six million, two hundred forty-two thousand, three hundred twenty-five".