266361686976 has 1344 divisors, whose sum is σ = 1008725114880. Its totient is φ = 60366028800.

The previous prime is 266361686963. The next prime is 266361687037. The reversal of 266361686976 is 679686163662.

It is a tau number, because it is divible by the number of its divisors (1344).

It is a Harshad number since it is a multiple of its sum of digits (66).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 3751573021 + ... + 3751573091.

It is an arithmetic number, because the mean of its divisors is an integer number (750539520).

Almost surely, 2^266361686976 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 266361686976, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (504362557440).

266361686976 is an abundant number, since it is smaller than the sum of its proper divisors (742363427904).

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

266361686976 is a wasteful number, since it uses less digits than its factorization.

266361686976 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 214 (or 193 counting only the distinct ones).

The product of its digits is 141087744, while the sum is 66.

The spelling of 266361686976 in words is "two hundred sixty-six billion, three hundred sixty-one million, six hundred eighty-six thousand, nine hundred seventy-six".