266959997856 has 96 divisors (see below), whose sum is σ = 789299723520. Its totient is φ = 87767649792.

The previous prime is 266959997839. The next prime is 266959997861. The reversal of 266959997856 is 658799959662.

It is a tau number, because it is divible by the number of its divisors (96).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2053240 + ... + 2179383.

It is an arithmetic number, because the mean of its divisors is an integer number (8221872120).

Almost surely, 2^266959997856 is an apocalyptic number.

It is an amenable number.

266959997856 is an abundant number, since it is smaller than the sum of its proper divisors (522339725664).

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

266959997856 is a wasteful number, since it uses less digits than its factorization.

266959997856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4232715 (or 4232701 counting only the distinct ones).

The product of its digits is 3968092800, while the sum is 81.

The spelling of 266959997856 in words is "two hundred sixty-six billion, nine hundred fifty-nine million, nine hundred ninety-seven thousand, eight hundred fifty-six".