266198780160 has 144 divisors (see below), whose sum is σ = 944636071680. Its totient is φ = 70986332160.

The previous prime is 266198780153. The next prime is 266198780219. The reversal of 266198780160 is 61087891662.

266198780160 is a `hidden beast` number, since 2 + 6 + 619 + 8 + 7 + 8 + 0 + 16 + 0 = 666.

266198780160 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (144).

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

It is a junction number, because it is equal to n+sod(n) for n = 266198780097 and 266198780106.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3816696 + ... + 3885815.

It is an arithmetic number, because the mean of its divisors is an integer number (6559972720).

Almost surely, 2^266198780160 is an apocalyptic number.

266198780160 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

266198780160 is an abundant number, since it is smaller than the sum of its proper divisors (678437291520).

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

266198780160 is an equidigital number, since it uses as much as digits as its factorization.

266198780160 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7702541 (or 7702521 counting only the distinct ones).

The product of its (nonzero) digits is 1741824, while the sum is 54.

The spelling of 266198780160 in words is "two hundred sixty-six billion, one hundred ninety-eight million, seven hundred eighty thousand, one hundred sixty".