5665566001555 has 4 divisors (see below), whose sum is σ = 6798679201872. Its totient is φ = 4532452801240.

The previous prime is 5665566001523. The next prime is 5665566001561. The reversal of 5665566001555 is 5551006655665.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 5665566001555 - 2⁵ = 5665566001523 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 5665566001496 and 5665566001505.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 566556600151 + ... + 566556600160.

It is an arithmetic number, because the mean of its divisors is an integer number (1699669800468).

Almost surely, 2^{5665566001555} is an apocalyptic number.

5665566001555 is a deficient number, since it is larger than the sum of its proper divisors (1133113200317).

5665566001555 is a wasteful number, since it uses less digits than its factorization.

5665566001555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1133113200316.

The product of its (nonzero) digits is 20250000, while the sum is 55.

The spelling of 5665566001555 in words is "five trillion, six hundred sixty-five billion, five hundred sixty-six million, one thousand, five hundred fifty-five".