2668911605 has 16 divisors (see below), whose sum is σ = 3423458304. Its totient is φ = 1992481920.

The previous prime is 2668911577. The next prime is 2668911611. The reversal of 2668911605 is 5061198662.

It is not a de Polignac number, because 2668911605 - 2⁶ = 2668911541 is a prime.

It is a Duffinian number.

It is a congruent 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 15 ways as a sum of consecutive naturals, for example, 278309 + ... + 287738.

It is an arithmetic number, because the mean of its divisors is an integer number (213966144).

Almost surely, 2^2668911605 is an apocalyptic number.

It is an amenable number.

2668911605 is a deficient number, since it is larger than the sum of its proper divisors (754546699).

2668911605 is a wasteful number, since it uses less digits than its factorization.

2668911605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 566116.

The product of its (nonzero) digits is 155520, while the sum is 44.

The square root of 2668911605 is about 51661.5098985696. The cubic root of 2668911605 is about 1387.1115778793. Note that the first 3 decimals are identical.

The spelling of 2668911605 in words is "two billion, six hundred sixty-eight million, nine hundred eleven thousand, six hundred five".