266386222080 has 264 divisors, whose sum is σ = 1006934267664. Its totient is φ = 64578355200.

The previous prime is 266386222057. The next prime is 266386222097. The reversal of 266386222080 is 80222683662.

266386222080 is a `hidden beast` number, since 2 + 6 + 638 + 6 + 2 + 2 + 2 + 0 + 8 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (264).

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

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 244110 + ... + 769650.

Almost surely, 2^266386222080 is an apocalyptic number.

266386222080 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 266386222080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (503467133832).

266386222080 is an abundant number, since it is smaller than the sum of its proper divisors (740548045584).

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

266386222080 is a wasteful number, since it uses less digits than its factorization.

266386222080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 525583 (or 525562 counting only the distinct ones).

The product of its (nonzero) digits is 663552, while the sum is 45.

The spelling of 266386222080 in words is "two hundred sixty-six billion, three hundred eighty-six million, two hundred twenty-two thousand, eighty".