65780516 has 24 divisors (see below), whose sum is σ = 117710880. Its totient is φ = 32155200.

The previous prime is 65780503. The next prime is 65780537. The reversal of 65780516 is 61508756.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 65780516.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49136 + ... + 50456.

It is an arithmetic number, because the mean of its divisors is an integer number (4904620).

Almost surely, 2^65780516 is an apocalyptic number.

It is an amenable number.

65780516 is a deficient number, since it is larger than the sum of its proper divisors (51930364).

65780516 is a wasteful number, since it uses less digits than its factorization.

65780516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1595 (or 1593 counting only the distinct ones).

The product of its (nonzero) digits is 50400, while the sum is 38.

The square root of 65780516 is about 8110.5188490010. The cubic root of 65780516 is about 403.6755310645.

The spelling of 65780516 in words is "sixty-five million, seven hundred eighty thousand, five hundred sixteen".