266688888886662 has 96 divisors (see below), whose sum is σ = 596154324952032. Its totient is φ = 79454162304000.

The previous prime is 266688888886661. The next prime is 266688888886691.

266688888886662 is nontrivially palindromic in base 10.

It is a super-2 number, since 2×266688888886662² (a number of 30 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 266688888886662.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (266688888886661) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 97003518 + ... + 99714894.

It is an arithmetic number, because the mean of its divisors is an integer number (6209940884917).

Almost surely, 2^{266688888886662} is an apocalyptic number.

266688888886662 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 266688888886662, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (298077162476016).

266688888886662 is an abundant number, since it is smaller than the sum of its proper divisors (329465436065370).

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

266688888886662 is a wasteful number, since it uses less digits than its factorization.

266688888886662 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2713686 (or 2713675 counting only the distinct ones).

The product of its digits is 391378894848, while the sum is 96.

The spelling of 266688888886662 in words is "two hundred sixty-six trillion, six hundred eighty-eight billion, eight hundred eighty-eight million, eight hundred eighty-six thousand, six hundred sixty-two".