266856617040 has 160 divisors (see below), whose sum is σ = 905495961216. Its totient is φ = 64610887680.

The previous prime is 266856617029. The next prime is 266856617063. The reversal of 266856617040 is 40716658662.

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 in 31 ways as a sum of consecutive naturals, for example, 510754 + ... + 891393.

Almost surely, 2^266856617040 is an apocalyptic number.

266856617040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

266856617040 is an abundant number, since it is smaller than the sum of its proper divisors (638639344176).

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

266856617040 is a wasteful number, since it uses less digits than its factorization.

266856617040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1402237 (or 1402231 counting only the distinct ones).

The product of its (nonzero) digits is 2903040, while the sum is 51.

The spelling of 266856617040 in words is "two hundred sixty-six billion, eight hundred fifty-six million, six hundred seventeen thousand, forty".