65556620272 has 40 divisors (see below), whose sum is σ = 149221542960. Its totient is φ = 27506273280.

The previous prime is 65556620191. The next prime is 65556620281. The reversal of 65556620272 is 27202665556.

It is a super-2 number, since 2×65556620272² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14323897 + ... + 14328472.

It is an arithmetic number, because the mean of its divisors is an integer number (3730538574).

Almost surely, 2^65556620272 is an apocalyptic number.

It is an amenable number.

65556620272 is an abundant number, since it is smaller than the sum of its proper divisors (83664922688).

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

65556620272 is a wasteful number, since it uses less digits than its factorization.

65556620272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28652401 (or 28652395 counting only the distinct ones).

The product of its (nonzero) digits is 1512000, while the sum is 46.

The spelling of 65556620272 in words is "sixty-five billion, five hundred fifty-six million, six hundred twenty thousand, two hundred seventy-two".