266678661330 has 24 divisors (see below), whose sum is σ = 693364519692. Its totient is φ = 71114309664.

The previous prime is 266678661299. The next prime is 266678661373. The reversal of 266678661330 is 33166876662.

266678661330 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 232758967401 + 33919693929 = 482451^2 + 184173^2 .

It is a super-2 number, since 2×266678661330² (a number of 24 digits) contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1481548029 + ... + 1481548208.

Almost surely, 2^266678661330 is an apocalyptic number.

266678661330 is an abundant number, since it is smaller than the sum of its proper divisors (426685858362).

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

266678661330 is a wasteful number, since it uses less digits than its factorization.

266678661330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2963096250 (or 2963096247 counting only the distinct ones).

The product of its (nonzero) digits is 7838208, while the sum is 54.

The spelling of 266678661330 in words is "two hundred sixty-six billion, six hundred seventy-eight million, six hundred sixty-one thousand, three hundred thirty".