2661275712 has 112 divisors (see below), whose sum is σ = 7408468800. Its totient is φ = 841881600.

The previous prime is 2661275707. The next prime is 2661275713. The reversal of 2661275712 is 2175721662.

2661275712 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a super-3 number, since 3×2661275712³ (a number of 29 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (2661275713) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 324462 + ... + 332562.

Almost surely, 2^2661275712 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2661275712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3704234400).

2661275712 is an abundant number, since it is smaller than the sum of its proper divisors (4747193088).

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

2661275712 is a wasteful number, since it uses less digits than its factorization.

2661275712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8204 (or 8194 counting only the distinct ones).

The product of its digits is 70560, while the sum is 39.

The square root of 2661275712 is about 51587.5538478033. The cubic root of 2661275712 is about 1385.7874484831.

The spelling of 2661275712 in words is "two billion, six hundred sixty-one million, two hundred seventy-five thousand, seven hundred twelve".