65717071240 has 16 divisors (see below), whose sum is σ = 147863410380. Its totient is φ = 26286828480.

The previous prime is 65717071201. The next prime is 65717071243. The reversal of 65717071240 is 4217071756.

It is a happy number.

65717071240 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 62943784996 + 2773286244 = 250886^2 + 52662^2 .

It is a Harshad number since it is a multiple of its sum of digits (40), and also a Moran number because the ratio is a prime number: 1642926781 = 65717071240 / (6 + 5 + 7 + 1 + 7 + 0 + 7 + 1 + 2 + 4 + 0).

It is a junction number, because it is equal to n+sod(n) for n = 65717071193 and 65717071202.

It is not an unprimeable number, because it can be changed into a prime (65717071243) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 821463351 + ... + 821463430.

Almost surely, 2^65717071240 is an apocalyptic number.

It is an amenable number.

65717071240 is an abundant number, since it is smaller than the sum of its proper divisors (82146339140).

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

65717071240 is a wasteful number, since it uses less digits than its factorization.

65717071240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1642926792 (or 1642926788 counting only the distinct ones).

The product of its (nonzero) digits is 82320, while the sum is 40.

The spelling of 65717071240 in words is "sixty-five billion, seven hundred seventeen million, seventy-one thousand, two hundred forty".