65825015 has 4 divisors (see below), whose sum is σ = 78990024. Its totient is φ = 52660008.

The previous prime is 65824981. The next prime is 65825017. The reversal of 65825015 is 51052856.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 65825015 - 2¹⁰ = 65823991 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65825017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6582497 + ... + 6582506.

It is an arithmetic number, because the mean of its divisors is an integer number (19747506).

Almost surely, 2^65825015 is an apocalyptic number.

65825015 is a deficient number, since it is larger than the sum of its proper divisors (13165009).

65825015 is a wasteful number, since it uses less digits than its factorization.

65825015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13165008.

The product of its (nonzero) digits is 12000, while the sum is 32.

The square root of 65825015 is about 8113.2616745671. The cubic root of 65825015 is about 403.7665362715.

The spelling of 65825015 in words is "sixty-five million, eight hundred twenty-five thousand, fifteen".