55065155165665 has 16 divisors (see below), whose sum is σ = 67524721821648. Its totient is φ = 43092699826176.

The previous prime is 55065155165659. The next prime is 55065155165687. The reversal of 55065155165665 is 56656155156055.

It can be written as a sum of positive squares in 8 ways, for example, as 2799253571409 + 52265901594256 = 1673097^2 + 7229516^2 .

It is a cyclic number.

It is not a de Polignac number, because 55065155165665 - 2¹⁹ = 55065154641377 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 308208972 + ... + 308387581.

It is an arithmetic number, because the mean of its divisors is an integer number (4220295113853).

Almost surely, 2^{55065155165665} is an apocalyptic number.

It is an amenable number.

55065155165665 is a deficient number, since it is larger than the sum of its proper divisors (12459566655983).

55065155165665 is a wasteful number, since it uses less digits than its factorization.

55065155165665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 616596948.

The product of its (nonzero) digits is 101250000, while the sum is 61.

The spelling of 55065155165665 in words is "fifty-five trillion, sixty-five billion, one hundred fifty-five million, one hundred sixty-five thousand, six hundred sixty-five".