266160720660 has 192 divisors, whose sum is σ = 798031471104. Its totient is φ = 66045952000.

The previous prime is 266160720659. The next prime is 266160720703. The reversal of 266160720660 is 66027061662.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 98176705 + ... + 98179415.

It is an arithmetic number, because the mean of its divisors is an integer number (4156413912).

Almost surely, 2^266160720660 is an apocalyptic number.

266160720660 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 266160720660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (399015735552).

266160720660 is an abundant number, since it is smaller than the sum of its proper divisors (531870750444).

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

266160720660 is a wasteful number, since it uses less digits than its factorization.

266160720660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3794 (or 3792 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 42.

The spelling of 266160720660 in words is "two hundred sixty-six billion, one hundred sixty million, seven hundred twenty thousand, six hundred sixty".