65660561124 has 12 divisors (see below), whose sum is σ = 153207975984. Its totient is φ = 21886853704.

The previous prime is 65660561107. The next prime is 65660561137. The reversal of 65660561124 is 42116506656.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×65660561124² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2735856702 + ... + 2735856725.

It is an arithmetic number, because the mean of its divisors is an integer number (12767331332).

Almost surely, 2^65660561124 is an apocalyptic number.

It is an amenable number.

65660561124 is an abundant number, since it is smaller than the sum of its proper divisors (87547414860).

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

65660561124 is a wasteful number, since it uses less digits than its factorization.

65660561124 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5471713434 (or 5471713432 counting only the distinct ones).

The product of its (nonzero) digits is 259200, while the sum is 42.

The spelling of 65660561124 in words is "sixty-five billion, six hundred sixty million, five hundred sixty-one thousand, one hundred twenty-four".