2661426123 has 4 divisors (see below), whose sum is σ = 3548568168. Its totient is φ = 1774284080.

The previous prime is 2661426113. The next prime is 2661426137. The reversal of 2661426123 is 3216241662.

2661426123 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2661426123 - 2⁴ = 2661426107 is a prime.

It is a super-2 number, since 2×2661426123² = 14166378016373622258, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2661426113) 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, 443571018 + ... + 443571023.

It is an arithmetic number, because the mean of its divisors is an integer number (887142042).

Almost surely, 2^2661426123 is an apocalyptic number.

2661426123 is a deficient number, since it is larger than the sum of its proper divisors (887142045).

2661426123 is an equidigital number, since it uses as much as digits as its factorization.

2661426123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 887142044.

The product of its digits is 20736, while the sum is 33.

The square root of 2661426123 is about 51589.0116497690. The cubic root of 2661426123 is about 1385.8135554799.

Adding to 2661426123 its reverse (3216241662), we get a palindrome (5877667785).

The spelling of 2661426123 in words is "two billion, six hundred sixty-one million, four hundred twenty-six thousand, one hundred twenty-three".