266680953812 has 96 divisors (see below), whose sum is σ = 583505233920. Its totient is φ = 103831136640.

The previous prime is 266680953797. The next prime is 266680953881. The reversal of 266680953812 is 218359086662.

It is a super-2 number, since 2×266680953812² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 15161639 + ... + 15179217.

It is an arithmetic number, because the mean of its divisors is an integer number (6078179520).

Almost surely, 2^266680953812 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 266680953812, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (291752616960).

266680953812 is an abundant number, since it is smaller than the sum of its proper divisors (316824280108).

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

266680953812 is a wasteful number, since it uses less digits than its factorization.

266680953812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18261 (or 18259 counting only the distinct ones).

The product of its (nonzero) digits is 7464960, while the sum is 56.

The spelling of 266680953812 in words is "two hundred sixty-six billion, six hundred eighty million, nine hundred fifty-three thousand, eight hundred twelve".