2660721104 has 20 divisors (see below), whose sum is σ = 5157782976. Its totient is φ = 1329680352.

The previous prime is 2660721101. The next prime is 2660721109. The reversal of 2660721104 is 4011270662.

2660721104 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Smith number, since the sum of its digits (29) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2660721101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9464 + ... + 73559.

Almost surely, 2^2660721104 is an apocalyptic number.

It is an amenable number.

2660721104 is a deficient number, since it is larger than the sum of its proper divisors (2497061872).

2660721104 is a wasteful number, since it uses less digits than its factorization.

2660721104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85034 (or 85028 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 2660721104 is about 51582.1781626174. The cubic root of 2660721104 is about 1385.6911760829.

Adding to 2660721104 its reverse (4011270662), we get a palindrome (6671991766).

The spelling of 2660721104 in words is "two billion, six hundred sixty million, seven hundred twenty-one thousand, one hundred four".