266976133640 has 32 divisors (see below), whose sum is σ = 600793481880. Its totient is φ = 106773176832.

The previous prime is 266976133631. The next prime is 266976133649. The reversal of 266976133640 is 46331679662.

It is a happy number.

266976133640 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (266976133631) and next prime (266976133649).

It can be written as a sum of positive squares in 4 ways, for example, as 262125568324 + 4850565316 = 511982^2 + 69646^2 .

It is a Smith number, since the sum of its digits (53) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (266976133649) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 288107 + ... + 785466.

Almost surely, 2^266976133640 is an apocalyptic number.

266976133640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

266976133640 is an abundant number, since it is smaller than the sum of its proper divisors (333817348240).

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

266976133640 is a wasteful number, since it uses less digits than its factorization.

266976133640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1079801 (or 1079797 counting only the distinct ones).

The product of its (nonzero) digits is 5878656, while the sum is 53.

The spelling of 266976133640 in words is "two hundred sixty-six billion, nine hundred seventy-six million, one hundred thirty-three thousand, six hundred forty".