65681620025072 has 20 divisors (see below), whose sum is σ = 127258486159560. Its totient is φ = 32840720371008.

The previous prime is 65681620025053. The next prime is 65681620025111. The reversal of 65681620025072 is 27052002618656.

It is a super-4 number, since 4×65681620025072⁴ (a number of 56 digits) contains 4444 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 65681620025072.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 654023 + ... + 11480025.

It is an arithmetic number, because the mean of its divisors is an integer number (6362924307978).

Almost surely, 2^{65681620025072} is an apocalyptic number.

It is an amenable number.

65681620025072 is a deficient number, since it is larger than the sum of its proper divisors (61576866134488).

65681620025072 is a wasteful number, since it uses less digits than its factorization.

65681620025072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11205200 (or 11205194 counting only the distinct ones).

The product of its (nonzero) digits is 2419200, while the sum is 50.

The spelling of 65681620025072 in words is "sixty-five trillion, six hundred eighty-one billion, six hundred twenty million, twenty-five thousand, seventy-two".