266652256442225 has 6 divisors (see below), whose sum is σ = 330648797988390. Its totient is φ = 213321805153760.

The previous prime is 266652256442147. The next prime is 266652256442239. The reversal of 266652256442225 is 522244652256662.

It can be written as a sum of positive squares in 3 ways, for example, as 20360382013504 + 246291874428721 = 4512248^2 + 15693689^2 .

It is not a de Polignac number, because 266652256442225 - 2³² = 266647961474929 is a prime.

It is a super-2 number, since 2×266652256442225² (a number of 30 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5333045128820 + ... + 5333045128869.

It is an arithmetic number, because the mean of its divisors is an integer number (55108132998065).

Almost surely, 2^{266652256442225} is an apocalyptic number.

266652256442225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

266652256442225 is a deficient number, since it is larger than the sum of its proper divisors (63996541546165).

266652256442225 is a wasteful number, since it uses less digits than its factorization.

266652256442225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10666090257699 (or 10666090257694 counting only the distinct ones).

The product of its digits is 165888000, while the sum is 59.

The spelling of 266652256442225 in words is "two hundred sixty-six trillion, six hundred fifty-two billion, two hundred fifty-six million, four hundred forty-two thousand, two hundred twenty-five".