266355265680 has 160 divisors (see below), whose sum is σ = 1048509676800. Its totient is φ = 60881200128.

The previous prime is 266355265679. The next prime is 266355265697. The reversal of 266355265680 is 86562553662.

266355265680 is a `hidden beast` number, since 2 + 6 + 6 + 3 + 55 + 26 + 568 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8792925 + ... + 8823164.

It is an arithmetic number, because the mean of its divisors is an integer number (6553185480).

Almost surely, 2^266355265680 is an apocalyptic number.

266355265680 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

266355265680 is an abundant number, since it is smaller than the sum of its proper divisors (782154411120).

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

266355265680 is a wasteful number, since it uses less digits than its factorization.

266355265680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17616118 (or 17616106 counting only the distinct ones).

The product of its (nonzero) digits is 15552000, while the sum is 54.

The spelling of 266355265680 in words is "two hundred sixty-six billion, three hundred fifty-five million, two hundred sixty-five thousand, six hundred eighty".