65720006663706 has 64 divisors (see below), whose sum is σ = 147170951798400. Its totient is φ = 21738266846208.

The previous prime is 65720006663671. The next prime is 65720006663723. The reversal of 65720006663706 is 60736660002756.

It is a super-2 number, since 2×65720006663706² (a number of 28 digits) contains 22 as substring.

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

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, 3804396 + ... + 12079463.

It is an arithmetic number, because the mean of its divisors is an integer number (2299546121850).

Almost surely, 2^{65720006663706} is an apocalyptic number.

65720006663706 is an abundant number, since it is smaller than the sum of its proper divisors (81450945134694).

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

65720006663706 is a wasteful number, since it uses less digits than its factorization.

65720006663706 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15884460 (or 15884454 counting only the distinct ones).

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

The spelling of 65720006663706 in words is "sixty-five trillion, seven hundred twenty billion, six million, six hundred sixty-three thousand, seven hundred six".