166683425 has 6 divisors (see below), whose sum is σ = 206687478. Its totient is φ = 133346720.

The previous prime is 166683403. The next prime is 166683427. The reversal of 166683425 is 524386661.

It can be written as a sum of positive squares in 3 ways, for example, as 55338721 + 111344704 = 7439^2 + 10552^2 .

It is not a de Polignac number, because 166683425 - 2⁸ = 166683169 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (166683427) 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, 3333644 + ... + 3333693.

It is an arithmetic number, because the mean of its divisors is an integer number (34447913).

Almost surely, 2^166683425 is an apocalyptic number.

It is an amenable number.

166683425 is a deficient number, since it is larger than the sum of its proper divisors (40004053).

166683425 is an equidigital number, since it uses as much as digits as its factorization.

166683425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6667347 (or 6667342 counting only the distinct ones).

The product of its digits is 207360, while the sum is 41.

The square root of 166683425 is about 12910.5935185025. The cubic root of 166683425 is about 550.3396524634.

The spelling of 166683425 in words is "one hundred sixty-six million, six hundred eighty-three thousand, four hundred twenty-five".