2578225866 has 8 divisors (see below), whose sum is σ = 5156451744. Its totient is φ = 859408620.

The previous prime is 2578225849. The next prime is 2578225901. The reversal of 2578225866 is 6685228752.

2578225866 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

2578225866 is an admirable number.

It is a super-2 number, since 2×2578225866² = 13294497232222899912, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 214852150 + ... + 214852161.

It is an arithmetic number, because the mean of its divisors is an integer number (644556468).

Almost surely, 2^2578225866 is an apocalyptic number.

2578225866 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

2578225866 is a wasteful number, since it uses less digits than its factorization.

2578225866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 429704316.

The product of its digits is 3225600, while the sum is 51.

The square root of 2578225866 is about 50776.2332789663. The cubic root of 2578225866 is about 1371.2195200729.

The spelling of 2578225866 in words is "two billion, five hundred seventy-eight million, two hundred twenty-five thousand, eight hundred sixty-six".