266516416560 has 80 divisors (see below), whose sum is σ = 852852556800. Its totient is φ = 68778428160.

The previous prime is 266516416559. The next prime is 266516416597. The reversal of 266516416560 is 65614615662.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (48).

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, 17903610 + ... + 17918489.

It is an arithmetic number, because the mean of its divisors is an integer number (10660656960).

Almost surely, 2^266516416560 is an apocalyptic number.

266516416560 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

266516416560 is an abundant number, since it is smaller than the sum of its proper divisors (586336140240).

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

266516416560 is a wasteful number, since it uses less digits than its factorization.

266516416560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35822146 (or 35822140 counting only the distinct ones).

The product of its (nonzero) digits is 1555200, while the sum is 48.

The spelling of 266516416560 in words is "two hundred sixty-six billion, five hundred sixteen million, four hundred sixteen thousand, five hundred sixty".