65645625 has 40 divisors (see below), whose sum is σ = 110564608. Its totient is φ = 34632000.

The previous prime is 65645621. The next prime is 65645651. The reversal of 65645625 is 52654656.

It is a happy number.

It is not a de Polignac number, because 65645625 - 2² = 65645621 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65645621) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 294264 + ... + 294486.

Almost surely, 2^65645625 is an apocalyptic number.

It is an amenable number.

65645625 is a deficient number, since it is larger than the sum of its proper divisors (44918983).

65645625 is a wasteful number, since it uses less digits than its factorization.

65645625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 403 (or 388 counting only the distinct ones).

The product of its digits is 216000, while the sum is 39.

The square root of 65645625 is about 8102.1987756411. The cubic root of 65645625 is about 403.3994135446.

The spelling of 65645625 in words is "sixty-five million, six hundred forty-five thousand, six hundred twenty-five".