266085540864 has 1056 divisors, whose sum is σ = 966650388480. Its totient is φ = 71597260800.

The previous prime is 266085540823. The next prime is 266085540911. The reversal of 266085540864 is 468045580662.

266085540864 is a `hidden beast` number, since 2 + 6 + 6 + 0 + 8 + 554 + 0 + 86 + 4 = 666.

It is a tau number, because it is divible by the number of its divisors (1056).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a self number, because there is not a number n which added to its sum of digits gives 266085540864.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1593326509 + ... + 1593326675.

Almost surely, 2^266085540864 is an apocalyptic number.

266085540864 is a gapful number since it is divisible by the number (24) 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 266085540864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (483325194240).

266085540864 is an abundant number, since it is smaller than the sum of its proper divisors (700564847616).

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

266085540864 is a wasteful number, since it uses less digits than its factorization.

266085540864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 264 (or 227 counting only the distinct ones).

The product of its (nonzero) digits is 11059200, while the sum is 54.

The spelling of 266085540864 in words is "two hundred sixty-six billion, eighty-five million, five hundred forty thousand, eight hundred sixty-four".