65616655600 has 30 divisors (see below), whose sum is σ = 157644016040. Its totient is φ = 26246662080.

The previous prime is 65616655571. The next prime is 65616655603. The reversal of 65616655600 is 655661656.

It is a super-2 number, since 2×65616655600² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65616655603) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 82020420 + ... + 82021219.

Almost surely, 2^65616655600 is an apocalyptic number.

It is an amenable number.

65616655600 is an abundant number, since it is smaller than the sum of its proper divisors (92027360440).

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

65616655600 is a wasteful number, since it uses less digits than its factorization.

65616655600 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 164041657 (or 164041646 counting only the distinct ones).

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

The spelling of 65616655600 in words is "sixty-five billion, six hundred sixteen million, six hundred fifty-five thousand, six hundred".