65818225 has 24 divisors (see below), whose sum is σ = 89735328. Its totient is φ = 47491200.

The previous prime is 65818213. The next prime is 65818241. The reversal of 65818225 is 52281856.

It is not a de Polignac number, because 65818225 - 2⁷ = 65818097 is a prime.

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

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 36802 + ... + 38548.

It is an arithmetic number, because the mean of its divisors is an integer number (3738972).

Almost surely, 2^65818225 is an apocalyptic number.

It is an amenable number.

65818225 is a deficient number, since it is larger than the sum of its proper divisors (23917103).

65818225 is a wasteful number, since it uses less digits than its factorization.

65818225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1905 (or 1900 counting only the distinct ones).

The product of its digits is 38400, while the sum is 37.

The square root of 65818225 is about 8112.8432130789. The cubic root of 65818225 is about 403.7526526487.

The spelling of 65818225 in words is "sixty-five million, eight hundred eighteen thousand, two hundred twenty-five".