65516789 has 8 divisors (see below), whose sum is σ = 70650720. Its totient is φ = 60396336.

The previous prime is 65516783. The next prime is 65516809. The reversal of 65516789 is 98761556.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-65516789 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65516783) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8234 + ... + 14100.

It is an arithmetic number, because the mean of its divisors is an integer number (8831340).

Almost surely, 2^65516789 is an apocalyptic number.

It is an amenable number.

65516789 is a deficient number, since it is larger than the sum of its proper divisors (5133931).

65516789 is a wasteful number, since it uses less digits than its factorization.

65516789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6739.

The product of its digits is 453600, while the sum is 47.

The square root of 65516789 is about 8094.2441895461. The cubic root of 65516789 is about 403.1353370264.

The spelling of 65516789 in words is "sixty-five million, five hundred sixteen thousand, seven hundred eighty-nine".