2660562665 has 4 divisors (see below), whose sum is σ = 3192675204. Its totient is φ = 2128450128.

The previous prime is 2660562659. The next prime is 2660562683. The reversal of 2660562665 is 5662650662.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1532879104 + 1127683561 = 39152^2 + 33581^2 .

It is a cyclic number.

It is not a de Polignac number, because 2660562665 - 2⁴ = 2660562649 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 266056262 + ... + 266056271.

It is an arithmetic number, because the mean of its divisors is an integer number (798168801).

Almost surely, 2^2660562665 is an apocalyptic number.

It is an amenable number.

2660562665 is a deficient number, since it is larger than the sum of its proper divisors (532112539).

2660562665 is an equidigital number, since it uses as much as digits as its factorization.

2660562665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 532112538.

The product of its (nonzero) digits is 777600, while the sum is 44.

The square root of 2660562665 is about 51580.6423476870. The cubic root of 2660562665 is about 1385.6636707722.

The spelling of 2660562665 in words is "two billion, six hundred sixty million, five hundred sixty-two thousand, six hundred sixty-five".