5665566655 has 32 divisors (see below), whose sum is σ = 8114909184. Its totient is φ = 3712765056.

The previous prime is 5665566631. The next prime is 5665566667. The reversal of 5665566655 is 5566655665.

5665566655 = T₂₆₆ + T₂₆₇ + ... + T₃₂₃₉.

It is not a de Polignac number, because 5665566655 - 2¹¹ = 5665564607 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 5665566596 and 5665566605.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1194669 + ... + 1199401.

It is an arithmetic number, because the mean of its divisors is an integer number (253590912).

Almost surely, 2^5665566655 is an apocalyptic number.

5665566655 is a deficient number, since it is larger than the sum of its proper divisors (2449342529).

5665566655 is a wasteful number, since it uses less digits than its factorization.

5665566655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6255.

The product of its digits is 24300000, while the sum is 55.

The square root of 5665566655 is about 75269.9585159976. The cubic root of 5665566655 is about 1782.7117123249.

The spelling of 5665566655 in words is "five billion, six hundred sixty-five million, five hundred sixty-six thousand, six hundred fifty-five".