2661115900 has 18 divisors (see below), whose sum is σ = 5774621720. Its totient is φ = 1064446320.

The previous prime is 2661115883. The next prime is 2661115901. The reversal of 2661115900 is 95111662.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2661115901) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 13305480 + ... + 13305679.

Almost surely, 2^2661115900 is an apocalyptic number.

2661115900 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2661115900 is an abundant number, since it is smaller than the sum of its proper divisors (3113505820).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2661115900 is a wasteful number, since it uses less digits than its factorization.

2661115900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26611173 (or 26611166 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 31.

The square root of 2661115900 is about 51586.0048850461. The cubic root of 2661115900 is about 1385.7597086670.

The spelling of 2661115900 in words is "two billion, six hundred sixty-one million, one hundred fifteen thousand, nine hundred".