166812625 has 32 divisors (see below), whose sum is σ = 239076864. Its totient is φ = 113832000.

The previous prime is 166812623. The next prime is 166812631. The reversal of 166812625 is 526218661.

It is not a de Polignac number, because 166812625 - 2¹ = 166812623 is a prime.

It is a Smith number, since the sum of its digits (37) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (166812623) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 271819 + ... + 272431.

It is an arithmetic number, because the mean of its divisors is an integer number (7471152).

Almost surely, 2^166812625 is an apocalyptic number.

It is an amenable number.

166812625 is a deficient number, since it is larger than the sum of its proper divisors (72264239).

166812625 is an equidigital number, since it uses as much as digits as its factorization.

166812625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 946 (or 936 counting only the distinct ones).

The product of its digits is 34560, while the sum is 37.

The square root of 166812625 is about 12915.5961922011. The cubic root of 166812625 is about 550.4818092088.

It can be divided in two parts, 16681 and 2625, that added together give a triangular number (19306 = T₁₉₆).

The spelling of 166812625 in words is "one hundred sixty-six million, eight hundred twelve thousand, six hundred twenty-five".