266693790338 has 8 divisors (see below), whose sum is σ = 404535524940. Its totient is φ = 131848615360.

The previous prime is 266693790331. The next prime is 266693790373. The reversal of 266693790338 is 833097396662.

It can be written as a sum of positive squares in 2 ways, for example, as 257346187849 + 9347602489 = 507293^2 + 96683^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×266693790338² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (266693790331) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 749139683 + ... + 749140038.

Almost surely, 2^266693790338 is an apocalyptic number.

266693790338 is a deficient number, since it is larger than the sum of its proper divisors (137841734602).

266693790338 is a wasteful number, since it uses less digits than its factorization.

266693790338 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1498279812.

The product of its (nonzero) digits is 52907904, while the sum is 62.

The spelling of 266693790338 in words is "two hundred sixty-six billion, six hundred ninety-three million, seven hundred ninety thousand, three hundred thirty-eight".