65720006663760 has 240 divisors, whose sum is σ = 236267482913280. Its totient is φ = 16960001564160.

The previous prime is 65720006663723. The next prime is 65720006663767. The reversal of 65720006663760 is 6736660002756.

It is a tau number, because it is divible by the number of its divisors (240).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a junction number, because it is equal to n+sod(n) for n = 65720006663697 and 65720006663706.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65720006663767) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 53924115 + ... + 55129394.

It is an arithmetic number, because the mean of its divisors is an integer number (984447845472).

Almost surely, 2^{65720006663760} is an apocalyptic number.

65720006663760 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

65720006663760 is an abundant number, since it is smaller than the sum of its proper divisors (170547476249520).

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

65720006663760 is a wasteful number, since it uses less digits than its factorization.

65720006663760 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109053568 (or 109053550 counting only the distinct ones).

The product of its (nonzero) digits is 11430720, while the sum is 54.

The spelling of 65720006663760 in words is "sixty-five trillion, seven hundred twenty billion, six million, six hundred sixty-three thousand, seven hundred sixty".