166504025 has 6 divisors (see below), whose sum is σ = 206465022. Its totient is φ = 133203200.

The previous prime is 166504003. The next prime is 166504043. The reversal of 166504025 is 520405661.

It can be written as a sum of positive squares in 3 ways, for example, as 274576 + 166229449 = 524^2 + 12893^2 .

It is not a de Polignac number, because 166504025 - 2¹² = 166499929 is a prime.

It is a Duffinian 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, 3330056 + ... + 3330105.

It is an arithmetic number, because the mean of its divisors is an integer number (34410837).

Almost surely, 2^166504025 is an apocalyptic number.

It is an amenable number.

166504025 is a deficient number, since it is larger than the sum of its proper divisors (39960997).

166504025 is an equidigital number, since it uses as much as digits as its factorization.

166504025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6660171 (or 6660166 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 29.

The square root of 166504025 is about 12903.6438652033. The cubic root of 166504025 is about 550.1421395715.

Adding to 166504025 its reverse (520405661), we get a palindrome (686909686).

The spelling of 166504025 in words is "one hundred sixty-six million, five hundred four thousand, twenty-five".