2565665570 has 32 divisors (see below), whose sum is σ = 5235209280. Its totient is φ = 897462720.

The previous prime is 2565665537. The next prime is 2565665579. The reversal of 2565665570 is 755665652.

2565665570 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (2565665579) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 516896 + ... + 521835.

It is an arithmetic number, because the mean of its divisors is an integer number (163600290).

Almost surely, 2^2565665570 is an apocalyptic number.

2565665570 is an abundant number, since it is smaller than the sum of its proper divisors (2669543710).

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

2565665570 is a wasteful number, since it uses less digits than its factorization.

2565665570 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1038770.

The product of its (nonzero) digits is 1890000, while the sum is 47.

The square root of 2565665570 is about 50652.3994495819. The cubic root of 2565665570 is about 1368.9891792504.

The spelling of 2565665570 in words is "two billion, five hundred sixty-five million, six hundred sixty-five thousand, five hundred seventy".