65687436 has 60 divisors (see below), whose sum is σ = 177666720. Its totient is φ = 21137760.

The previous prime is 65687381. The next prime is 65687443. The reversal of 65687436 is 63478656.

It is a junction number, because it is equal to n+sod(n) for n = 65687391 and 65687400.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 5901 + ... + 12891.

It is an arithmetic number, because the mean of its divisors is an integer number (2961112).

Almost surely, 2^65687436 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 65687436, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (88833360).

65687436 is an abundant number, since it is smaller than the sum of its proper divisors (111979284).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

65687436 is a wasteful number, since it uses less digits than its factorization.

65687436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7036 (or 7025 counting only the distinct ones).

The product of its digits is 725760, while the sum is 45.

The square root of 65687436 is about 8104.7785904366. The cubic root of 65687436 is about 403.4850397295.

The spelling of 65687436 in words is "sixty-five million, six hundred eighty-seven thousand, four hundred thirty-six".