5651611566660 has 36 divisors (see below), whose sum is σ = 17143221752748. Its totient is φ = 1507096417728.

The previous prime is 5651611566619. The next prime is 5651611566661. The reversal of 5651611566660 is 666651161565.

It can be written as a sum of positive squares in 2 ways, for example, as 1203325629444 + 4448285937216 = 1096962^2 + 2109096^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a junction number, because it is equal to n+sod(n) for n = 5651611566597 and 5651611566606.

It is not an unprimeable number, because it can be changed into a prime (5651611566661) 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 11 ways as a sum of consecutive naturals, for example, 15698920839 + ... + 15698921198.

It is an arithmetic number, because the mean of its divisors is an integer number (476200604243).

Almost surely, 2^{5651611566660} is an apocalyptic number.

It is an amenable number.

5651611566660 is an abundant number, since it is smaller than the sum of its proper divisors (11491610186088).

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

5651611566660 is a wasteful number, since it uses less digits than its factorization.

5651611566660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31397842052 (or 31397842047 counting only the distinct ones).

The product of its (nonzero) digits is 5832000, while the sum is 54.

The spelling of 5651611566660 in words is "five trillion, six hundred fifty-one billion, six hundred eleven million, five hundred sixty-six thousand, six hundred sixty".