266787243904 has 16 divisors (see below), whose sum is σ = 531490212720. Its totient is φ = 133393621888.

The previous prime is 266787243883. The next prime is 266787243917. The reversal of 266787243904 is 409342787662.

It is a tau number, because it is divible by the number of its divisors (16).

It is a super-2 number, since 2×266787243904² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 1042137544 + ... + 1042137799.

It is an arithmetic number, because the mean of its divisors is an integer number (33218138295).

Almost surely, 2^266787243904 is an apocalyptic number.

It is an amenable number.

266787243904 is a deficient number, since it is larger than the sum of its proper divisors (264702968816).

266787243904 is an equidigital number, since it uses as much as digits as its factorization.

266787243904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2084275357 (or 2084275345 counting only the distinct ones).

The product of its (nonzero) digits is 24385536, while the sum is 58.

The spelling of 266787243904 in words is "two hundred sixty-six billion, seven hundred eighty-seven million, two hundred forty-three thousand, nine hundred four".