65661703710020 has 48 divisors (see below), whose sum is σ = 151188572703168. Its totient is φ = 23755780191360.

The previous prime is 65661703709963. The next prime is 65661703710041. The reversal of 65661703710020 is 2001730716656.

It is a super-3 number, since 3×65661703710020³ (a number of 42 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 757475162 + ... + 757561841.

It is an arithmetic number, because the mean of its divisors is an integer number (3149761931316).

Almost surely, 2^{65661703710020} is an apocalyptic number.

It is an amenable number.

65661703710020 is an abundant number, since it is smaller than the sum of its proper divisors (85526868993148).

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

65661703710020 is a wasteful number, since it uses less digits than its factorization.

65661703710020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1515037220 (or 1515037218 counting only the distinct ones).

The product of its (nonzero) digits is 317520, while the sum is 44.

The spelling of 65661703710020 in words is "sixty-five trillion, six hundred sixty-one billion, seven hundred three million, seven hundred ten thousand, twenty".