2666313423225 has 81 divisors (see below), whose sum is σ = 4993383879757. Its totient is φ = 1359918880320.

The previous prime is 2666313423203. The next prime is 2666313423229. The reversal of 2666313423225 is 5223243136662.

It is a happy number.

The square root of 2666313423225 is 1632885.

It is a perfect power (a square), and thus also a powerful number.

2666313423225 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 595408227129 + 2070905196096 = 771627^2 + 1439064^2 .

It is not a de Polignac number, because 2666313423225 - 2²⁵ = 2666279868793 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2666313423229) by changing a digit.

It is a polite number, since it can be written in 80 ways as a sum of consecutive naturals, for example, 563342959 + ... + 563347691.

Almost surely, 2^{2666313423225} is an apocalyptic number.

2666313423225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

2666313423225 is the 1632885-th square number.

2666313423225 is the 816443-rd centered octagonal number.

It is an amenable number.

2666313423225 is a deficient number, since it is larger than the sum of its proper divisors (2327070456532).

2666313423225 is an frugal number, since it uses more digits than its factorization.

2666313423225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9528 (or 4764 counting only the distinct ones).

The product of its digits is 1866240, while the sum is 45.

Adding to 2666313423225 its reverse (5223243136662), we get a palindrome (7889556559887).

The spelling of 2666313423225 in words is "two trillion, six hundred sixty-six billion, three hundred thirteen million, four hundred twenty-three thousand, two hundred twenty-five".