2520650665 has 16 divisors (see below), whose sum is σ = 3258637200. Its totient is φ = 1860728832.

The previous prime is 2520650611. The next prime is 2520650747. The reversal of 2520650665 is 5660560252.

2520650665 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 8 ways, for example, as 47279376 + 2473371289 = 6876^2 + 49733^2 .

It is a cyclic number.

It is not a de Polignac number, because 2520650665 - 2¹⁷ = 2520519593 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 239841 + ... + 250129.

It is an arithmetic number, because the mean of its divisors is an integer number (203664825).

Almost surely, 2^2520650665 is an apocalyptic number.

It is an amenable number.

2520650665 is a deficient number, since it is larger than the sum of its proper divisors (737986535).

2520650665 is a wasteful number, since it uses less digits than its factorization.

2520650665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14076.

The product of its (nonzero) digits is 108000, while the sum is 37.

The square root of 2520650665 is about 50206.0819522894. The cubic root of 2520650665 is about 1360.9355343975.

The spelling of 2520650665 in words is "two billion, five hundred twenty million, six hundred fifty thousand, six hundred sixty-five".