65780834 has 12 divisors (see below), whose sum is σ = 114781014. Its totient is φ = 28191744.

The previous prime is 65780833. The next prime is 65780839. The reversal of 65780834 is 43808756.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 54538225 + 11242609 = 7385^2 + 3353^2 .

It is a junction number, because it is equal to n+sod(n) for n = 65780791 and 65780800.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65780833) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 335519 + ... + 335714.

Almost surely, 2^65780834 is an apocalyptic number.

65780834 is a deficient number, since it is larger than the sum of its proper divisors (49000180).

65780834 is a wasteful number, since it uses less digits than its factorization.

65780834 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 671249 (or 671242 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 41.

The square root of 65780834 is about 8110.5384531485. The cubic root of 65780834 is about 403.6761815541.

The spelling of 65780834 in words is "sixty-five million, seven hundred eighty thousand, eight hundred thirty-four".