266947900558080 has 720 divisors, whose sum is σ = 1006585834947840. Its totient is φ = 60281349660672.

The previous prime is 266947900558037. The next prime is 266947900558091. The reversal of 266947900558080 is 80855009749662.

It is a super-2 number, since 2×266947900558080² (a number of 30 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 266947900557996 and 266947900558014.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 765072301 + ... + 765421139.

It is an arithmetic number, because the mean of its divisors is an integer number (1398035881872).

Almost surely, 2^{266947900558080} is an apocalyptic number.

266947900558080 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 266947900558080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (503292917473920).

266947900558080 is an abundant number, since it is smaller than the sum of its proper divisors (739637934389760).

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

266947900558080 is an frugal number, since it uses more digits than its factorization.

266947900558080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 348974 (or 348939 counting only the distinct ones).

The product of its (nonzero) digits is 261273600, while the sum is 69.

The spelling of 266947900558080 in words is "two hundred sixty-six trillion, nine hundred forty-seven billion, nine hundred million, five hundred fifty-eight thousand, eighty".