266913593436672 has 2880 divisors, whose sum is σ = 1047885551032320. Its totient is φ = 63499935744000.

The previous prime is 266913593436499. The next prime is 266913593436697. The reversal of 266913593436672 is 276634395319662.

266913593436672 is a `hidden beast` number, since 2 + 6 + 6 + 9 + 1 + 35 + 93 + 436 + 6 + 72 = 666.

It is a super-2 number, since 2×266913593436672² (a number of 30 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a self number, because there is not a number n which added to its sum of digits gives 266913593436672.

It is an unprimeable number.

It is a polite number, since it can be written in 287 ways as a sum of consecutive naturals, for example, 543612206347 + ... + 543612206837.

It is an arithmetic number, because the mean of its divisors is an integer number (363849149664).

Almost surely, 2^{266913593436672} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 266913593436672, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (523942775516160).

266913593436672 is an abundant number, since it is smaller than the sum of its proper divisors (780971957595648).

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

266913593436672 is a wasteful number, since it uses less digits than its factorization.

266913593436672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 687 (or 637 counting only the distinct ones).

The product of its digits is 1587237120, while the sum is 72.

The spelling of 266913593436672 in words is "two hundred sixty-six trillion, nine hundred thirteen billion, five hundred ninety-three million, four hundred thirty-six thousand, six hundred seventy-two".