266272957440 has 792 divisors, whose sum is σ = 1090812565440. Its totient is φ = 58830520320.

The previous prime is 266272957427. The next prime is 266272957441. The reversal of 266272957440 is 44759272662.

It is a happy number.

266272957440 is a `hidden beast` number, since 2 + 6 + 6 + 2 + 7 + 29 + 574 + 40 = 666.

It is not an unprimeable number, because it can be changed into a prime (266272957441) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 309979731 + ... + 309980589.

Almost surely, 2^266272957440 is an apocalyptic number.

266272957440 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 266272957440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (545406282720).

266272957440 is an abundant number, since it is smaller than the sum of its proper divisors (824539608000).

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

266272957440 is a wasteful number, since it uses less digits than its factorization.

266272957440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 959 (or 907 counting only the distinct ones).

The product of its (nonzero) digits is 10160640, while the sum is 54.

The spelling of 266272957440 in words is "two hundred sixty-six billion, two hundred seventy-two million, nine hundred fifty-seven thousand, four hundred forty".