65661717244716 has 96 divisors (see below), whose sum is σ = 174415020595200. Its totient is φ = 21354303971520.

The previous prime is 65661717244709. The next prime is 65661717244723. The reversal of 65661717244716 is 61744271716656.

65661717244716 is a `hidden beast` number, since 6 + 5 + 6 + 6 + 1 + 7 + 172 + 447 + 16 = 666.

It is an interprime number because it is at equal distance from previous prime (65661717244709) and next prime (65661717244723).

It is a super-2 number, since 2×65661717244716² (a number of 28 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 31018140 + ... + 33067331.

It is an arithmetic number, because the mean of its divisors is an integer number (1816823131200).

Almost surely, 2^{65661717244716} is an apocalyptic number.

It is an amenable number.

65661717244716 is an abundant number, since it is smaller than the sum of its proper divisors (108753303350484).

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

65661717244716 is a wasteful number, since it uses less digits than its factorization.

65661717244716 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64085716 (or 64085708 counting only the distinct ones).

The product of its digits is 71124480, while the sum is 63.

The spelling of 65661717244716 in words is "sixty-five trillion, six hundred sixty-one billion, seven hundred seventeen million, two hundred forty-four thousand, seven hundred sixteen".