2660805742 has 24 divisors (see below), whose sum is σ = 4656669264. Its totient is φ = 1136947392.

The previous prime is 2660805737. The next prime is 2660805781. The reversal of 2660805742 is 2475080662.

It is a junction number, because it is equal to n+sod(n) for n = 2660805695 and 2660805704.

It is a congruent number.

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 11 ways as a sum of consecutive naturals, for example, 7258 + ... + 73309.

It is an arithmetic number, because the mean of its divisors is an integer number (194027886).

Almost surely, 2^2660805742 is an apocalyptic number.

2660805742 is a deficient number, since it is larger than the sum of its proper divisors (1995863522).

2660805742 is a wasteful number, since it uses less digits than its factorization.

2660805742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80920 (or 80913 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 40.

The square root of 2660805742 is about 51582.9985751119. The cubic root of 2660805742 is about 1385.7058689527.

The spelling of 2660805742 in words is "two billion, six hundred sixty million, eight hundred five thousand, seven hundred forty-two".