8166825 has 60 divisors (see below), whose sum is σ = 15679180. Its totient is φ = 4199040.

The previous prime is 8166799. The next prime is 8166841. The reversal of 8166825 is 5286618.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 281961 + 7884864 = 531^2 + 2808^2 .

It is not a de Polignac number, because 8166825 - 2⁵ = 8166793 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 8166825.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 74871 + ... + 74979.

Almost surely, 2^8166825 is an apocalyptic number.

It is an amenable number.

8166825 is a deficient number, since it is larger than the sum of its proper divisors (7512355).

8166825 is a wasteful number, since it uses less digits than its factorization.

8166825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168 (or 154 counting only the distinct ones).

The product of its digits is 23040, while the sum is 36.

The square root of 8166825 is about 2857.7657356753. The cubic root of 8166825 is about 201.3806553555.

Adding to 8166825 its sum of digits (36), we get a triangular number (8166861 = T₄₀₄₁).

The spelling of 8166825 in words is "eight million, one hundred sixty-six thousand, eight hundred twenty-five".