2682198665 has 4 divisors (see below), whose sum is σ = 3218638404. Its totient is φ = 2145758928.

The previous prime is 2682198619. The next prime is 2682198689. The reversal of 2682198665 is 5668912862.

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 373107856 + 2309090809 = 19316^2 + 48053^2 .

It is a cyclic number.

It is not a de Polignac number, because 2682198665 - 2⁶ = 2682198601 is a prime.

It is a Duffinian number.

It is a Curzon 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, 268219862 + ... + 268219871.

It is an arithmetic number, because the mean of its divisors is an integer number (804659601).

Almost surely, 2^2682198665 is an apocalyptic number.

It is an amenable number.

2682198665 is a deficient number, since it is larger than the sum of its proper divisors (536439739).

2682198665 is an equidigital number, since it uses as much as digits as its factorization.

2682198665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 536439738.

The product of its digits is 2488320, while the sum is 53.

The square root of 2682198665 is about 51789.9475284538. The cubic root of 2682198665 is about 1389.4096599477.

The spelling of 2682198665 in words is "two billion, six hundred eighty-two million, one hundred ninety-eight thousand, six hundred sixty-five".