2663781121 has 8 divisors (see below), whose sum is σ = 2676852360. Its totient is φ = 2650724352.

The previous prime is 2663781103. The next prime is 2663781137. The reversal of 2663781121 is 1211873662.

It can be written as a sum of positive squares in 4 ways, for example, as 2768896 + 2661012225 = 1664^2 + 51585^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2663781121 - 2⁵ = 2663781089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2663781181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 601965 + ... + 606373.

It is an arithmetic number, because the mean of its divisors is an integer number (334606545).

Almost surely, 2^2663781121 is an apocalyptic number.

It is an amenable number.

2663781121 is a deficient number, since it is larger than the sum of its proper divisors (13071239).

2663781121 is a wasteful number, since it uses less digits than its factorization.

2663781121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7235.

The product of its digits is 24192, while the sum is 37.

The square root of 2663781121 is about 51611.8312114577. The cubic root of 2663781121 is about 1386.2221867755. Note that the first 3 decimals are identical.

The spelling of 2663781121 in words is "two billion, six hundred sixty-three million, seven hundred eighty-one thousand, one hundred twenty-one".