2566442665 has 8 divisors (see below), whose sum is σ = 3083132160. Its totient is φ = 2050886832.

The previous prime is 2566442647. The next prime is 2566442693. The reversal of 2566442665 is 5662446652.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2566442665 - 2⁵ = 2566442633 is a prime.

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 7 ways as a sum of consecutive naturals, for example, 278425 + ... + 287494.

It is an arithmetic number, because the mean of its divisors is an integer number (385391520).

Almost surely, 2^2566442665 is an apocalyptic number.

It is an amenable number.

2566442665 is a deficient number, since it is larger than the sum of its proper divisors (516689495).

2566442665 is an equidigital number, since it uses as much as digits as its factorization.

2566442665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 566831.

The product of its digits is 2073600, while the sum is 46.

The square root of 2566442665 is about 50660.0697295217. The cubic root of 2566442665 is about 1369.1273795509.

The spelling of 2566442665 in words is "two billion, five hundred sixty-six million, four hundred forty-two thousand, six hundred sixty-five".