2566755420 has 48 divisors (see below), whose sum is σ = 7258089888. Its totient is φ = 677689600.

The previous prime is 2566755413. The next prime is 2566755473. The reversal of 2566755420 is 245576652.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 205719 + ... + 217838.

It is an arithmetic number, because the mean of its divisors is an integer number (151210206).

Almost surely, 2^2566755420 is an apocalyptic number.

2566755420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2566755420 is an abundant number, since it is smaller than the sum of its proper divisors (4691334468).

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

2566755420 is a wasteful number, since it uses less digits than its factorization.

2566755420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 423670 (or 423668 counting only the distinct ones).

The product of its (nonzero) digits is 504000, while the sum is 42.

The square root of 2566755420 is about 50663.1564354216. The cubic root of 2566755420 is about 1369.1829927215.

The spelling of 2566755420 in words is "two billion, five hundred sixty-six million, seven hundred fifty-five thousand, four hundred twenty".