65660505616 has 40 divisors (see below), whose sum is σ = 134062830144. Its totient is φ = 31091913600.

The previous prime is 65660505601. The next prime is 65660505619. The reversal of 65660505616 is 61650506656.

65660505616 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×65660505616² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (46).

It is not an unprimeable number, because it can be changed into a prime (65660505619) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 846126 + ... + 920461.

Almost surely, 2^65660505616 is an apocalyptic number.

It is an amenable number.

65660505616 is an abundant number, since it is smaller than the sum of its proper divisors (68402324528).

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

65660505616 is a wasteful number, since it uses less digits than its factorization.

65660505616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1766719 (or 1766713 counting only the distinct ones).

The product of its (nonzero) digits is 972000, while the sum is 46.

The spelling of 65660505616 in words is "sixty-five billion, six hundred sixty million, five hundred five thousand, six hundred sixteen".