266366880000 has 2160 divisors, whose sum is σ = 1171450215936. Its totient is φ = 59719680000.

The previous prime is 266366879963. The next prime is 266366880019. The reversal of 266366880000 is 88663662.

266366880000 is a `hidden beast` number, since 2 + 6 + 636 + 6 + 8 + 8 + 0 + 0 + 0 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (2160).

It is a super-4 number, since 4×266366880000⁴ (a number of 47 digits) contains 4444 as substring.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 239 ways as a sum of consecutive naturals, for example, 8592479985 + ... + 8592480015.

Almost surely, 2^266366880000 is an apocalyptic number.

266366880000 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 266366880000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (585725107968).

266366880000 is an abundant number, since it is smaller than the sum of its proper divisors (905083335936).

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

266366880000 is an equidigital number, since it uses as much as digits as its factorization.

266366880000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112 (or 71 counting only the distinct ones).

The product of its (nonzero) digits is 497664, while the sum is 45.

The spelling of 266366880000 in words is "two hundred sixty-six billion, three hundred sixty-six million, eight hundred eighty thousand".