2520566866 has 16 divisors (see below), whose sum is σ = 3981146400. Its totient is φ = 1193561568.

The previous prime is 2520566861. The next prime is 2520566911. The reversal of 2520566866 is 6686650252.

It is not an unprimeable number, because it can be changed into a prime (2520566861) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 130545 + ... + 148603.

It is an arithmetic number, because the mean of its divisors is an integer number (248821650).

Almost surely, 2^2520566866 is an apocalyptic number.

2520566866 is a deficient number, since it is larger than the sum of its proper divisors (1460579534).

2520566866 is a wasteful number, since it uses less digits than its factorization.

2520566866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21753.

The product of its (nonzero) digits is 1036800, while the sum is 46.

The square root of 2520566866 is about 50205.2473950682. The cubic root of 2520566866 is about 1360.9204528021.

The spelling of 2520566866 in words is "two billion, five hundred twenty million, five hundred sixty-six thousand, eight hundred sixty-six".