266613066216020 has 12 divisors (see below), whose sum is σ = 559887439053684. Its totient is φ = 106645226486400.

The previous prime is 266613066215983. The next prime is 266613066216041. The reversal of 266613066216020 is 20612660316662.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 147923633212996 + 118689433003024 = 12162386^2 + 10894468^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6665326655381 + ... + 6665326655420.

It is an arithmetic number, because the mean of its divisors is an integer number (46657286587807).

Almost surely, 2^{266613066216020} is an apocalyptic number.

266613066216020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

266613066216020 is an abundant number, since it is smaller than the sum of its proper divisors (293274372837664).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

266613066216020 is a wasteful number, since it uses less digits than its factorization.

266613066216020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13330653310810 (or 13330653310808 counting only the distinct ones).

The product of its (nonzero) digits is 1119744, while the sum is 47.

The spelling of 266613066216020 in words is "two hundred sixty-six trillion, six hundred thirteen billion, sixty-six million, two hundred sixteen thousand, twenty".