166236625 has 16 divisors (see below), whose sum is σ = 219669840. Its totient is φ = 125164800.

The previous prime is 166236611. The next prime is 166236641. The reversal of 166236625 is 526632661.

It can be written as a sum of positive squares in 8 ways, for example, as 17372224 + 148864401 = 4168^2 + 12201^2 .

It is not a de Polignac number, because 166236625 - 2⁵ = 166236593 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36990 + ... + 41239.

It is an arithmetic number, because the mean of its divisors is an integer number (13729365).

Almost surely, 2^166236625 is an apocalyptic number.

It is an amenable number.

166236625 is a deficient number, since it is larger than the sum of its proper divisors (53433215).

166236625 is an equidigital number, since it uses as much as digits as its factorization.

166236625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78261 (or 78251 counting only the distinct ones).

The product of its digits is 77760, while the sum is 37.

The square root of 166236625 is about 12893.2782875419. The cubic root of 166236625 is about 549.8474783690.

The spelling of 166236625 in words is "one hundred sixty-six million, two hundred thirty-six thousand, six hundred twenty-five".