2684765665 has 8 divisors (see below), whose sum is σ = 3241484928. Its totient is φ = 2134635120.

The previous prime is 2684765659. The next prime is 2684765687. The reversal of 2684765665 is 5665674862.

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

It is not a de Polignac number, because 2684765665 - 2¹³ = 2684757473 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 (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1646281 + ... + 1647910.

It is an arithmetic number, because the mean of its divisors is an integer number (405185616).

Almost surely, 2^2684765665 is an apocalyptic number.

It is an amenable number.

2684765665 is a deficient number, since it is larger than the sum of its proper divisors (556719263).

2684765665 is a wasteful number, since it uses less digits than its factorization.

2684765665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3294359.

The product of its digits is 14515200, while the sum is 55.

The square root of 2684765665 is about 51814.7244033971. The cubic root of 2684765665 is about 1389.8527637637.

The spelling of 2684765665 in words is "two billion, six hundred eighty-four million, seven hundred sixty-five thousand, six hundred sixty-five".