266520672000 has 1152 divisors, whose sum is σ = 1111177267200. Its totient is φ = 62318592000.

The previous prime is 266520671999. The next prime is 266520672053. The reversal of 266520672000 is 276025662.

266520672000 is a `hidden beast` number, since 2 + 66 + 520 + 6 + 72 + 0 + 0 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (1152).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 275615517 + ... + 275616483.

It is an arithmetic number, because the mean of its divisors is an integer number (964563600).

Almost surely, 2^266520672000 is an apocalyptic number.

266520672000 is a gapful number since it is divisible by the number (20) 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 266520672000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (555588633600).

266520672000 is an abundant number, since it is smaller than the sum of its proper divisors (844656595200).

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

266520672000 is a wasteful number, since it uses less digits than its factorization.

266520672000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1047 (or 1017 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 36.

Adding to 266520672000 its reverse (276025662), we get a palindrome (266796697662).

The spelling of 266520672000 in words is "two hundred sixty-six billion, five hundred twenty million, six hundred seventy-two thousand".