266949231552 has 448 divisors, whose sum is σ = 834766732800. Its totient is φ = 83537879040.

The previous prime is 266949231529. The next prime is 266949231557. The reversal of 266949231552 is 255132949662.

266949231552 is a `hidden beast` number, since 2 + 6 + 69 + 4 + 9 + 23 + 1 + 552 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (266949231557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 244682527 + ... + 244683617.

It is an arithmetic number, because the mean of its divisors is an integer number (1863318600).

Almost surely, 2^266949231552 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 266949231552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (417383366400).

266949231552 is an abundant number, since it is smaller than the sum of its proper divisors (567817501248).

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

266949231552 is a wasteful number, since it uses less digits than its factorization.

266949231552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1281 (or 1265 counting only the distinct ones).

The product of its digits is 6998400, while the sum is 54.

It can be divided in two parts, 266949 and 231552, that added together give a triangular number (498501 = T₉₉₈).

The spelling of 266949231552 in words is "two hundred sixty-six billion, nine hundred forty-nine million, two hundred thirty-one thousand, five hundred fifty-two".