65566655155 has 4 divisors (see below), whose sum is σ = 78679986192. Its totient is φ = 52453324120.

The previous prime is 65566655093. The next prime is 65566655171. The reversal of 65566655155 is 55155666556.

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

It is not a de Polignac number, because 65566655155 - 2¹¹ = 65566653107 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 65566655096 and 65566655105.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6556665511 + ... + 6556665520.

It is an arithmetic number, because the mean of its divisors is an integer number (19669996548).

Almost surely, 2^65566655155 is an apocalyptic number.

65566655155 is a deficient number, since it is larger than the sum of its proper divisors (13113331037).

65566655155 is a wasteful number, since it uses less digits than its factorization.

65566655155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13113331036.

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

The spelling of 65566655155 in words is "sixty-five billion, five hundred sixty-six million, six hundred fifty-five thousand, one hundred fifty-five".