42771066655 has 4 divisors (see below), whose sum is σ = 51325279992. Its totient is φ = 34216853320.

The previous prime is 42771066641. The next prime is 42771066697. The reversal of 42771066655 is 55666017724.

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

It is not a de Polignac number, because 42771066655 - 2²⁹ = 42234195743 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 42771066599 and 42771066608.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4277106661 + ... + 4277106670.

It is an arithmetic number, because the mean of its divisors is an integer number (12831319998).

Almost surely, 2^42771066655 is an apocalyptic number.

42771066655 is a deficient number, since it is larger than the sum of its proper divisors (8554213337).

42771066655 is an equidigital number, since it uses as much as digits as its factorization.

42771066655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8554213336.

The product of its (nonzero) digits is 2116800, while the sum is 49.

The spelling of 42771066655 in words is "forty-two billion, seven hundred seventy-one million, sixty-six thousand, six hundred fifty-five".