65991024792196 has 81 divisors (see below), whose sum is σ = 134782298693847. Its totient is φ = 28188821359440.

The previous prime is 65991024792179. The next prime is 65991024792257. The reversal of 65991024792196 is 69129742019956.

It is a happy number.

The square root of 65991024792196 is 8123486.

It is a perfect power (a square), and thus also a powerful number.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 43103215951 + ... + 43103217481.

Almost surely, 2^{65991024792196} is an apocalyptic number.

65991024792196 is the 8123486-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 65991024792196

65991024792196 is an abundant number, since it is smaller than the sum of its proper divisors (68791273901651).

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

65991024792196 is an frugal number, since it uses more digits than its factorization.

65991024792196 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3838 (or 1919 counting only the distinct ones).

The product of its (nonzero) digits is 132269760, while the sum is 70.

The spelling of 65991024792196 in words is "sixty-five trillion, nine hundred ninety-one billion, twenty-four million, seven hundred ninety-two thousand, one hundred ninety-six".