55666055161 has 16 divisors (see below), whose sum is σ = 59574491280. Its totient is φ = 51828940800.

The previous prime is 55666055153. The next prime is 55666055167. The reversal of 55666055161 is 16155066655.

It can be written as a sum of positive squares in 8 ways, for example, as 13100175936 + 42565879225 = 114456^2 + 206315^2 .

It is a cyclic number.

It is not a de Polignac number, because 55666055161 - 2³ = 55666055153 is a prime.

It is not an unprimeable number, because it can be changed into a prime (55666055167) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2110825 + ... + 2137033.

It is an arithmetic number, because the mean of its divisors is an integer number (3723405705).

Almost surely, 2^55666055161 is an apocalyptic number.

It is an amenable number.

55666055161 is a deficient number, since it is larger than the sum of its proper divisors (3908436119).

55666055161 is a wasteful number, since it uses less digits than its factorization.

55666055161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27564.

The product of its (nonzero) digits is 810000, while the sum is 46.

The spelling of 55666055161 in words is "fifty-five billion, six hundred sixty-six million, fifty-five thousand, one hundred sixty-one".