65617825 has 24 divisors (see below), whose sum is σ = 100146368. Its totient is φ = 41532480.

The previous prime is 65617823. The next prime is 65617829. The reversal of 65617825 is 52871656.

It is not a de Polignac number, because 65617825 - 2¹ = 65617823 is a prime.

It is not an unprimeable number, because it can be changed into a prime (65617823) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12147 + ... + 16696.

Almost surely, 2^65617825 is an apocalyptic number.

65617825 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

65617825 is a deficient number, since it is larger than the sum of its proper divisors (34528543).

65617825 is a wasteful number, since it uses less digits than its factorization.

65617825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28873 (or 28868 counting only the distinct ones).

The product of its digits is 100800, while the sum is 40.

The square root of 65617825 is about 8100.4830102902. The cubic root of 65617825 is about 403.3424608427.

It can be divided in two parts, 656 and 17825, that added together give a palindrome (18481).

The spelling of 65617825 in words is "sixty-five million, six hundred seventeen thousand, eight hundred twenty-five".