2661563122 has 4 divisors (see below), whose sum is σ = 3992344686. Its totient is φ = 1330781560.

The previous prime is 2661563117. The next prime is 2661563123. The reversal of 2661563122 is 2213651662.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2213651662 = 2 ⋅1106825831.

It can be written as a sum of positive squares in only one way, i.e., 2656268521 + 5294601 = 51539^2 + 2301^2 .

It is a super-3 number, since 3×2661563122³ (a number of 29 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (2661563123) by changing a digit.

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 as a sum of consecutive naturals, namely, 665390779 + ... + 665390782.

Almost surely, 2^2661563122 is an apocalyptic number.

2661563122 is a deficient number, since it is larger than the sum of its proper divisors (1330781564).

2661563122 is a wasteful number, since it uses less digits than its factorization.

2661563122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1330781563.

The product of its digits is 25920, while the sum is 34.

The square root of 2661563122 is about 51590.3394251288. The cubic root of 2661563122 is about 1385.8373336856.

The spelling of 2661563122 in words is "two billion, six hundred sixty-one million, five hundred sixty-three thousand, one hundred twenty-two".