266946449280 has 1536 divisors, whose sum is σ = 1119860121600. Its totient is φ = 53648179200.

The previous prime is 266946449269. The next prime is 266946449291. The reversal of 266946449280 is 82944649662.

It is an interprime number because it is at equal distance from previous prime (266946449269) and next prime (266946449291).

It is a super-2 number, since 2×266946449280² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (60).

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, 1767857205 + ... + 1767857355.

It is an arithmetic number, because the mean of its divisors is an integer number (729075600).

Almost surely, 2^266946449280 is an apocalyptic number.

266946449280 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 266946449280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (559930060800).

266946449280 is an abundant number, since it is smaller than the sum of its proper divisors (852913672320).

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

266946449280 is a wasteful number, since it uses less digits than its factorization.

266946449280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 272 (or 253 counting only the distinct ones).

The product of its (nonzero) digits is 35831808, while the sum is 60.

The spelling of 266946449280 in words is "two hundred sixty-six billion, nine hundred forty-six million, four hundred forty-nine thousand, two hundred eighty".