7855225566 has 16 divisors (see below), whose sum is σ = 15712281984. Its totient is φ = 2618103384.

The previous prime is 7855225531. The next prime is 7855225583. The reversal of 7855225566 is 6655225587.

It is a happy number.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 16960 + ... + 126483.

It is an arithmetic number, because the mean of its divisors is an integer number (982017624).

Almost surely, 2^7855225566 is an apocalyptic number.

7855225566 is an abundant number, since it is smaller than the sum of its proper divisors (7857056418).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

7855225566 is a wasteful number, since it uses less digits than its factorization.

7855225566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 152575.

The product of its digits is 5040000, while the sum is 51.

The square root of 7855225566 is about 88629.7104023250. The cubic root of 7855225566 is about 1987.8619466916.

The spelling of 7855225566 in words is "seven billion, eight hundred fifty-five million, two hundred twenty-five thousand, five hundred sixty-six".