65655551660660 has 24 divisors (see below), whose sum is σ = 148482555294696. Its totient is φ = 24242049843840.

The previous prime is 65655551660639. The next prime is 65655551660711. The reversal of 65655551660660 is 6606615555656.

It can be written as a sum of positive squares in 4 ways, for example, as 1460138723044 + 64195412937616 = 1208362^2 + 8012204^2 .

It is a junction number, because it is equal to n+sod(n) for n = 65655551660593 and 65655551660602.

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, 126260676011 + ... + 126260676530.

It is an arithmetic number, because the mean of its divisors is an integer number (6186773137279).

Almost surely, 2^{65655551660660} is an apocalyptic number.

It is an amenable number.

65655551660660 is an abundant number, since it is smaller than the sum of its proper divisors (82827003634036).

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

65655551660660 is a wasteful number, since it uses less digits than its factorization.

65655551660660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 252521352563 (or 252521352561 counting only the distinct ones).

The product of its (nonzero) digits is 145800000, while the sum is 62.

The spelling of 65655551660660 in words is "sixty-five trillion, six hundred fifty-five billion, five hundred fifty-one million, six hundred sixty thousand, six hundred sixty".