65691825 has 48 divisors (see below), whose sum is σ = 116867520. Its totient is φ = 32440320.

The previous prime is 65691809. The next prime is 65691833. The reversal of 65691825 is 52819656.

65691825 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 65691825 - 2⁴ = 65691809 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 47 ways as a sum of consecutive naturals, for example, 85041 + ... + 85809.

It is an arithmetic number, because the mean of its divisors is an integer number (2434740).

Almost surely, 2^65691825 is an apocalyptic number.

It is an amenable number.

65691825 is a deficient number, since it is larger than the sum of its proper divisors (51175695).

65691825 is a wasteful number, since it uses less digits than its factorization.

65691825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 866 (or 861 counting only the distinct ones).

The product of its digits is 129600, while the sum is 42.

The square root of 65691825 is about 8105.0493521014. The cubic root of 65691825 is about 403.4940260060.

The spelling of 65691825 in words is "sixty-five million, six hundred ninety-one thousand, eight hundred twenty-five".