266120218172928 has 480 divisors, whose sum is σ = 845369141224608. Its totient is φ = 74132029440000.

The previous prime is 266120218172923. The next prime is 266120218172987. The reversal of 266120218172928 is 829271812021662.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (266120218172923) 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, 4928033928 + ... + 4928087928.

Almost surely, 2^{266120218172928} is an apocalyptic number.

266120218172928 is a gapful number since it is divisible by the number (28) 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 266120218172928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (422684570612304).

266120218172928 is an abundant number, since it is smaller than the sum of its proper divisors (579248923051680).

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

266120218172928 is a wasteful number, since it uses less digits than its factorization.

266120218172928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55674 (or 55651 counting only the distinct ones).

The product of its (nonzero) digits is 4644864, while the sum is 57.

The spelling of 266120218172928 in words is "two hundred sixty-six trillion, one hundred twenty billion, two hundred eighteen million, one hundred seventy-two thousand, nine hundred twenty-eight".