164866825 has 12 divisors (see below), whose sum is σ = 204597148. Its totient is φ = 131788800.

The previous prime is 164866817. The next prime is 164866831. The reversal of 164866825 is 528668461.

164866825 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 6 ways, for example, as 101042704 + 63824121 = 10052^2 + 7989^2 .

It is not a de Polignac number, because 164866825 - 2³ = 164866817 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 51265 + ... + 54385.

Almost surely, 2^164866825 is an apocalyptic number.

It is an amenable number.

164866825 is a deficient number, since it is larger than the sum of its proper divisors (39730323).

164866825 is a wasteful number, since it uses less digits than its factorization.

164866825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5244 (or 5239 counting only the distinct ones).

The product of its digits is 552960, while the sum is 46.

The square root of 164866825 is about 12840.0477024036. The cubic root of 164866825 is about 548.3330520678. Note that the first 3 decimals are identical.

The spelling of 164866825 in words is "one hundred sixty-four million, eight hundred sixty-six thousand, eight hundred twenty-five".